{"title":"Gears \u0026 Gearboxes","description":"","products":[{"product_id":"pocket-bike-transmission-type-3","title":"Universal Parts Type-3 Pocket Bike Gearbox Transmission","description":"\u003cp\u003eRestore the snap and reliability of your drivetrain with the \u003cstrong\u003eUniversal Parts Type-3 Gearbox Transmission\u003c\/strong\u003e. Specifically engineered for 47cc and 49cc air-cooled 2-stroke engines, this \"Cag-style\" transmission acts as a direct-fit replacement for worn or grinding factory gearboxes. Whether you're refreshing a pit bike or building a custom pocket quad, this gearbox ensures your engine's torque is efficiently delivered to the ground with minimal friction and maximum durability.\u003c\/p\u003e\u003ch3\u003eKey Performance Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized 6-Tooth Sprocket:\u003c\/strong\u003e Pre-installed with a high-tensile 6-tooth drive sprocket, perfect for maintaining high-end speed on small-displacement racing engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChain Compatibility:\u003c\/strong\u003e Fully compatible with \u003cstrong\u003eT8F \/ BF05T\u003c\/strong\u003e chain standards, the most common sizes for import pocket bikes and quads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision 78mm Clutch Drum:\u003c\/strong\u003e Features a balanced internal drum design that matches standard 3-shoe centrifugal clutches for smooth engagement and reduced heat build-up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Bolt-On Fit:\u003c\/strong\u003e Designed as a \"drop-in\" assembly with standard mounting patterns, requiring zero modifications to your Cag or Daytona-style frame.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eComprehensive Fitment Guide\u003c\/h3\u003e\u003cp\u003eThis Type-3 Gearbox is a direct replacement for \u003cstrong\u003e47cc and 49cc 2-Stroke\u003c\/strong\u003e engines used in:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eVehicle Category\u003c\/th\u003e\n\u003cth\u003eCommon Compatible Styles\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePocket Bikes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCagllari CAG, Daytona, MTA1, MTA2, Lucky 7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePocket Quads \/ ATVs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e47cc \/ 49cc Mini Quads \u0026amp; Dirt Bikes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGo-Karts\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSmall-frame 2-stroke \"Stand-up\" Goped-style karts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Type-3 Gearbox Transmission\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSprocket Size:\u003c\/strong\u003e 6-Tooth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClutch Drum ID:\u003c\/strong\u003e 78mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Height:\u003c\/strong\u003e 57mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Cast Aluminum Housing \/ Steel Internals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChain Size:\u003c\/strong\u003e T8F or BF05T\u003c\/li\u003e\n\u003c\/ul\u003e\u003cblockquote\u003e \u003cstrong\u003eInstallation Tip:\u003c\/strong\u003e When installing, ensure your chain tension has roughly 1\/2 inch of \"play\" to prevent premature wear on the gearbox output shaft bearings. \u003c\/blockquote\u003e\u003ch3\u003eAbout Universal Parts\u003c\/h3\u003e\u003cp\u003eUniversal Parts is a comprehensive line of quality, affordable replacement parts for Chinese-made scooters, pocket bikes, and ATVs. From basic consumables to complete drivetrain assemblies, Universal Parts offers reliable solutions to keep your ride running.\u003c\/p\u003e\u003cp\u003eCalifornia Prop 65 Warning\u003c\/p\u003e","brand":"Universal Parts","offers":[{"title":"Default Title","offer_id":67964485665089,"sku":"157-8","price":23.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/451037.jpg?v=1792945399"},{"product_id":"idle-shaft-gear-type-2","title":"Universal Parts Idle Shaft Gear Type-2","description":"Universal Parts Idle Shaft Gear Type-2 for 50cc 4-stroke QMB139 engines. \n\n\u003cul\u003e \n\n\u003cli\u003ePlease be sure to count the teeth of your spiral gear or measure the dimensions  \n\n\u003c\/li\u003e\n\u003cli\u003eOverall Height: 48.5mm  \n\n\u003c\/li\u003e\n\u003cli\u003eNumber of Geared Teeth: 8\u003c\/li\u003e\n\u003c\/ul\u003eQMB139 50cc\/49cc , Various unlisted makes\/models","brand":"Universal Parts","offers":[{"title":"Default Title","offer_id":67964498182465,"sku":"151-211","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/451177.jpg?v=1792945466"},{"product_id":"vog-260-gear-box-snorkel-connector","title":"Universal Parts VOG 260 Gear Box Snorkel Connector","description":"Universal Parts Gear Box Snorkel Connector for VOG 260 BN169MM Engines commonly found in Linhai 250\/260\/300 Scooters and many other makes and models. \u003cbr\u003e\u003cbr\u003eSome of the models and brands using this engine include the Aprilia Leonardo 250, Aprilia Leonardo 300, Benelli Velvet 250, CF Moto V3\/V5, Diamo Turista, Italjet Jupiter 250, JCL, VOG 260, Linhai Aeolus, Linhai ATV 260, Linhai Tank 260, Tank Touring 250DE, Malaguti Madison 250, Malaguti Password 250, MBK Kilibre 300, MBK Skyliner 250, Renault Kouranos 250, Roketa MC-54 250B, Xingyue VOG 260, Yamaha Majesty 250 (mod. 1999), Yamaha Majesty 250 and many more.\u003cul\u003e \u003cli\u003e\u003cspan\u003eOuter Diameter (flanged end): 10mm  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003eLinhai 260, VOG 260, Various unlisted makes\/models","brand":"Universal Parts","offers":[{"title":"Default Title","offer_id":67964506046785,"sku":"122-85","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/453324_d9920f2c-f507-4bc8-891c-e66f1fd7eb2b.jpg?v=1792945435"},{"product_id":"naraku-18-36-gear-set-for-gy6","title":"Naraku 18\/36 Gear Set for GY6","description":"\u003cbr\u003eNaraku 18\/36 Gear Set for 125\/150cc GY6 engines. +35% Gear Ratio for increased top speed.\u003cbr\u003e\u003cul\u003e \n\n\u003cli\u003e35% Taller Gearing\u003c\/li\u003e\n\u003cli\u003eRecommended For Use With A Big Bore Kit  \n\n\u003c\/li\u003e\n\u003c\/ul\u003eGY6 QMI\/QMJ 152\/157, Various unlisted makes\/models","brand":"Naraku","offers":[{"title":"Default Title","offer_id":67964510896449,"sku":"137-3","price":98.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/137-3_5ca600d8-4550-4e44-8d54-4fec35b81282.webp?v=1792993056"},{"product_id":"standard-scooter-transmission","title":"Universal Parts Standard Scooter Transmission","description":"Universal Parts Scooter transmission without sprocket, 6-pinion shaft compatible with standard 6-pinion drive chain sprockets. Fits most 33cc, 36cc, 43cc, 49cc, 50cc, and 52cc Chinese-made gas scooters, pocket bikes, and mini-choppers.\u003cul\u003e \n\n    \n\n  \u003cli\u003e \n\n    Approximate Gear Reduction: 5:1   \n\n  \u003c\/li\u003e \n\n  \u003cli\u003e \n\n    Includes 20 Tooth Sprocket \n\n  \u003c\/li\u003e \n\n   \u003cli\u003e \n\n    Inner Diameter (clutchbell): 77.5mm \n\n      \u003c\/li\u003e \n\n\u003c\/ul\u003e","brand":"Universal Parts","offers":[{"title":"Default Title","offer_id":67964511289665,"sku":"157-1","price":31.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-2637-0-157-1.main.01.default.jpg?v=1792557708"},{"product_id":"gear-4th-vma2","title":"Gear, 4th - VMA2","description":"\u003cp\u003eStandard fouth gear for 125 Primavera VMA2.\u003c\/p\u003e","brand":"Mec Eur","offers":[{"title":"Default Title","offer_id":67964519317825,"sku":"152838","price":46.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6212-0-152838_732d54c4-a823-41d2-bc30-962de6c30a82.jpg?v=1792557755"},{"product_id":"transmission-upgrade-p125x-stella","title":"Transmission Upgrade; P125X, Stella","description":"\u003cp\u003eMalossi primary gear upgrade for P125\/150\/Stella. replaces your clutch gear and outer ring gear from your cush drive with new straight cut versions.\u003c\/p\u003e","brand":"Malossi","offers":[{"title":"Default Title","offer_id":67964524462401,"sku":"MTU2","price":227.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-5361-0-mtu2_3a8ad832-268c-441e-8f11-12240c807f32.jpg?v=1792557761"},{"product_id":"transmission-set-cvt-variator-clutch-weights-honda-ruckus-metropolitan-2012-older","title":"NCY Super Transmission Kit - Honda Ruckus \u0026 Metropolitan","description":"\u003cp\u003eThis \u003cstrong\u003eNCY Super Transmission Kit\u003c\/strong\u003e is a complete CVT upgrade for the Honda Ruckus and 2002-2009 Metropolitan with the stock, carbureted Honda GET 50cc engine. It's made to install easily, add more power and give you a better ride, and it's built to last longer than stock parts.\u003c\/p\u003e\u003cp\u003eEverything you need to rebuild the transmission comes in one box: variator, NCY's popular lightweight outer drive face, 107mm clutch and bell, adjustable torque drive, torque spring, variator sliders, and a roller weight tuning kit with three different weights.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight outer drive face:\u003c\/strong\u003e Includes the same NCY lightweight outer drive face that Ruckus riders buy on its own as one of the most popular pulley upgrades. Less rotating weight on the front pulley helps the engine spin up faster.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance variator:\u003c\/strong\u003e NCY variator paired with the drive face for a matched front pulley setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e107mm clutch and bell:\u003c\/strong\u003e Three-shoe clutch with red springs and a matching vented clutch bell.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable torque drive:\u003c\/strong\u003e Replaces the stock rear torque driver and comes with bearings and nut installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1000 RPM torque spring:\u003c\/strong\u003e Performance torque spring for the rear pulley.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariator sliders:\u003c\/strong\u003e Three new sliders for the variator, so the front pulley goes back together fresh.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoller weight tuning kit:\u003c\/strong\u003e Three sets of 16x13mm rollers in three different weights, so you can dial in the CVT for quicker takeoff or more top speed.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1200-1220\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 812722027315\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Honda GET 50cc, stock and carbureted (not fuel-injected)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive face:\u003c\/strong\u003e NCY lightweight outer drive face\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClutch and bell size:\u003c\/strong\u003e 107mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRollers:\u003c\/strong\u003e 16x13mm, 3 sets in 3 different weights\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque spring:\u003c\/strong\u003e 1000 RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariator sliders:\u003c\/strong\u003e 3 included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Variator, lightweight outer drive face, 107mm clutch and bell, adjustable torque drive, 1000 RPM torque spring, 3 variator sliders, 3 sets of 16x13mm rollers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e NCY\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eRoller Weight Tuning Guide\u003c\/h3\u003e\u003cp\u003eRoller weight is the easiest way to change how your scooter feels. The three roller sets in this kit let you tune for how and where you ride:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLighter rollers:\u003c\/strong\u003e Faster acceleration and better uphill pull. The engine revs higher, which is great for stop-and-go riding, hills or heavier riders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMiddle rollers:\u003c\/strong\u003e A balanced setup with good takeoff and improved top-end speed. This is a great starting point for most riders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavier rollers:\u003c\/strong\u003e Maximum top-end speed and lower cruising RPM, with softer acceleration. Best for flat roads, lighter riders or open-road riding.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTorque Drive Channel Tuning Guide\u003c\/h3\u003e\u003cp\u003eThe adjustable rear clutch sheave gives you another way to dial in how your scooter delivers power. Choosing the straight or curved guide channels changes how the rear pulley shifts under load, helping you match the CVT to your riding style and engine setup.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStraight channels, quicker takeoff:\u003c\/strong\u003e Choose the straight channels for a more immediate, acceleration-focused response. This setting favors hard launches and drag-style riding, where getting up to speed quickly matters most.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurved channels, smoother cruising:\u003c\/strong\u003e Choose the curved channels for a more progressive shift and steadier cruising RPM. This setting favors a smoother transition through the CVT’s range and top-end-oriented tuning.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eStart with the middle roller-weight set and choose the channel profile that matches your goal. Keep the rollers and torque spring unchanged while testing the channels, then fine-tune roller weight afterward. Changing one setting at a time makes it easier to feel what actually improved.\u003c\/p\u003e\u003cp\u003eChannel selection changes how the transmission uses the engine’s available power; Test under consistent conditions in a safe, closed-course environment.\u003c\/p\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda Ruckus (NPS50)\u003c\/td\u003e\n\u003ctd\u003eCarbureted models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda Metropolitan (CHF50)\u003c\/td\u003e\n\u003ctd\u003e2002-2009\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eMade only for stock, non-fuel-injected engines. Not for the 2013 and newer Metropolitan (NCH50) or fuel-injected models.\u003c\/p\u003e\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eReuse your stock variator ramp plate.\u003c\/li\u003e\n\u003cli\u003eStart with the middle roller set, then swap to lighter or heavier sets to dial in takeoff and top speed.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis product is intended for off-road use only. This product is not intended for use on public roads or land.\u003c\/p\u003e\u003cp\u003ePerformance parts, electrical parts and tools are not refundable or covered by warranty. See the store policies for more information.\u003c\/p\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964554346817,"sku":"1200-1220","price":324.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-7087-0-1200-1220_26286507-0e64-4c63-a501-cee4e958628f.jpg?v=1792557838"},{"product_id":"transmission-case-assembly-gy50-qmb139","title":"Transmission Case Assembly; 139QMB","description":"\u003cp\u003eComplete transmission case assembly\u003c\/p\u003e","brand":"Brand not specified","offers":[{"title":"Default Title","offer_id":67964555002177,"sku":"1100-1318","price":33.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6848-0-1100-1318_9a3e5c0e-3e12-49d9-8a51-7962ab438a4d.jpg?v=1792557839"},{"product_id":"transmission-case-gasket-gy50-qmb139","title":"Blue Line Gearbox Case Gasket - 139QMB \u0026 GY6","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eBlue Line gearbox case gasket\u003c\/strong\u003e is a fresh start for a leak-free gearbox service on compatible GY6 125\/150 and 139QMB-based 50\/80cc scooters. Replace a damaged or torn gasket when opening the transmission case to help keep gear oil where it belongs and get your scooter ready for the next ride.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGearbox sealing:\u003c\/strong\u003e Helps restore the seal between matching transmission case mating surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal application:\u003c\/strong\u003e Fits compatible GY6 125\/150 and 139QMB-based scooter gearboxes with the same gasket outline, bolt holes and passage layout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService-ready replacement:\u003c\/strong\u003e Ideal to have on hand before opening the gearbox for repair or maintenance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor may vary:\u003c\/strong\u003e Supplied gasket color may differ from the product photos\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Blue Line\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1100-1319\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart type:\u003c\/strong\u003e Gearbox \/ transmission case gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine families:\u003c\/strong\u003e GY6 125cc \/ 150cc and 139QMB \/ QMB139-based 50cc \/ 80cc four-stroke applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon GY6 125 engine codes:\u003c\/strong\u003e 152QMI, 1P52QMI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon GY6 150 engine codes:\u003c\/strong\u003e 157QMJ, 1P57QMJ\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment basis:\u003c\/strong\u003e Matching case profile, bolt-hole pattern and passage openings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContents:\u003c\/strong\u003e One gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e May vary\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eFitment\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eChicago Scooter Company OEM applications\u003c\/td\u003e\n\u003ctd\u003ego., go. MAX, Bella Classic 50, Pug 50 and Nitro Sport 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGY6 125cc\u003c\/td\u003e\n\u003ctd\u003e152QMI and 1P52QMI engines with matching gearbox cases\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGY6 150cc\u003c\/td\u003e\n\u003ctd\u003e157QMJ and 1P57QMJ engines with matching gearbox cases\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGY6 50 \/ 139QMB-based 50cc and 80cc\u003c\/td\u003e\n\u003ctd\u003e139QMB \/ QMB139, 139QMA, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD and other QMA \/ QMB applications, where the gearbox gasket configuration matches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eFor universal applications, compare the old gasket and case mating surfaces before ordering. The outline, mounting holes and passage openings must match. An engine code containing “QM” or “FM” alone does not establish compatibility. Clean the mating surfaces and follow the vehicle's service procedure during installation.\u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=15\"\u003eBELLA CLASSIC 50 GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 12\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=154\"\u003eGO MAX GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 12\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=3\"\u003eQMB139 GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 12\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Blue Line","offers":[{"title":"Default Title","offer_id":67964555952449,"sku":"1100-1319","price":2.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6849-0-1100-1319_ebacab9a-5847-4d5c-b27b-4e6122e8505c.jpg?v=1792557840"},{"product_id":"transmission-set-gen-4-super-kit-clutch-cvt-springs-genuine-gy6-150cc-ncy-brand","title":"NCY Super Transmission Set 112mm - Genuine \u0026 GY6 150-232cc","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eNCY Super Transmission Set — the ultimate bolt-on CVT performance upgrade for GY6 150–232cc engines and Genuine Buddy 125\/150\/170i scooters. Delivers faster acceleration, higher top-end speed, and a smoother powerband through friction-reducing coated components and ultralight, balanced construction. Includes every component needed for a complete CVT rebuild. Made in Taiwan by NCY. SKU: 1200-1048.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eComplete Kit Contents:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e112mm Overdrive Variator:\u003c\/strong\u003e Golden pulley friction-reducing coated face for extended gear range and reduced rotational mass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Face:\u003c\/strong\u003e Ultralight forged aluminum outer drive face for reduced reciprocating mass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRacing Clutch:\u003c\/strong\u003e Large-shoe design with green outer housing, high-friction pads, and red engagement springs for instant engagement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVented Clutch Bell:\u003c\/strong\u003e Black 10-spoke drilled and lightened design for superior heat dissipation and grip\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Slider \/ Torque Driver:\u003c\/strong\u003e Orange dual-range torque driver for consistent belt tension\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6-Arm Variator Boss \/ Ramp Plate:\u003c\/strong\u003e Silver forged ramp plate with optimal ramp angle for precise roller engagement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoller Weight Tuning Kit:\u003c\/strong\u003e 3 sets of 6 rollers — 10g, 11g, and 12g (18x14mm) for precision tuning - 18 rollers total\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1500 RPM Compression Spring:\u003c\/strong\u003e Yellow performance clutch contra\/compression spring with ball-bearing seat to prevent spring bind\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Sliders (x3):\u003c\/strong\u003e Red replacement sliders for variator ramp plate\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eRoller Weight Tuning Guide:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10g (lighter):\u003c\/strong\u003e Quicker off-the-line acceleration and better hill climbing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12g (heavier):\u003c\/strong\u003e Lower cruising RPM and higher top speed potential\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePro tip:\u003c\/strong\u003e Mix weights (e.g., three 10g + three 11g alternating) for a custom balance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e112mm overdrive variator with friction-reducing coating — extended gear range and reduced rotational mass\u003c\/li\u003e\n\u003cli\u003eLarge-shoe racing clutch with green housing, high-friction pads, and red engagement springs for instant engagement\u003c\/li\u003e\n\u003cli\u003eBlack 10-spoke vented clutch bell — drilled and lightened for heat dissipation\u003c\/li\u003e\n\u003cli\u003eThree roller weight options: 10g, 11g, 12g (18x14mm) — mix and match for custom tuning | Ball-bearing spring seat prevents spring bind\u003c\/li\u003e\n\u003cli\u003eComplete CVT rebuild kit — variator, drive face, clutch, bell, secondary slider, ramp plate, roller weights, spring | SKU: 1200-1048 | Made in Taiwan by NCY\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrand: NCY\u003c\/li\u003e\n\u003cli\u003eSKU: 1200-1048 | MPN: 1200-1048-1\u003c\/li\u003e\n\u003cli\u003eVariator diameter: 112mm\u003c\/li\u003e\n\u003cli\u003eRoller weights: 18x14mm (10g, 11g, 12g included)\u003c\/li\u003e\n\u003cli\u003eContra Spring engagement: 1500 RPM\u003c\/li\u003e\n\u003cli\u003eWeight: 8.38 lbs\u003c\/li\u003e\n\u003cli\u003eMade in Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Scooter Co.:\u003c\/strong\u003e Buddy 125, Buddy 150, Buddy 170i, Hooligan 170i, Blur 150\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGY6 Platforms:\u003c\/strong\u003e 150cc–232cc scooters, ATVs, Go-Karts, and Side-by-Sides with engine codes below\u003c\/li\u003e\n\u003c\/ul\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"4\"\u003eCompatible Engine Codes (includes any QM or FM code)\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e157QMJ\u003c\/td\u003e\n\u003ctd\u003e161QMK\u003c\/td\u003e\n\u003ctd\u003e152QMI\u003c\/td\u003e\n\u003ctd\u003e1P61QMK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYN1P57QMJ\u003c\/td\u003e\n\u003ctd\u003e1P52FMI\u003c\/td\u003e\n\u003ctd\u003e154FMI\u003c\/td\u003e\n\u003ctd\u003eJJ157QMJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1P57QMJ\u003c\/td\u003e\n\u003ctd\u003eBN157QMJ\u003c\/td\u003e\n\u003ctd\u003eBN161QMK-A\u003c\/td\u003e\n\u003ctd\u003eOther QMJ, QMK, QMI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eDon’t see your engine listed? If the 125cc+ engine code includes “QM” or “FM” this kit is compatible with your vehicle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation Notes:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAn impact wrench or CVT holding tool is required to remove factory clutch and variator nuts\u003c\/li\u003e\n\u003cli\u003eUse graphite or molybdenum disulfide (moly) grease on variator boss\/slide \u003c\/li\u003e\n\u003cli\u003eInstall a new drive belt with this kit — a worn belt will not seat correctly in the 112mm variator\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eOff-road \/ competition use only.\u003c\/strong\u003e Not intended for use on pollution-controlled vehicles or on public roads. Not legal for use on pollution-controlled vehicles in California. Check local laws before installing. Performance upgrades are considered racing parts and are not covered under warranty.\u003c\/p\u003e\u003ch2\u003eManuals\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/files\/ncy_super_transmission_kit.pdf?v=1697199932\"\u003eInstructions\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964557164865,"sku":"1200-1048","price":324.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6948-0-1200-1048_7791beb8-18c4-4355-ba6a-8aa1d77afff0.jpg?v=1792557842"},{"product_id":"countershaft-gy50-qmb139","title":"Countershaft; 139QMB","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis stock countershaft reduction gear replaces original equipment on CSC go, go MAX, Bella Classic 50, Nitro Sport 50, and Pug 50 scooters, and bikes running 139QMB engines.\u003c\/p\u003e\u003cp\u003eOriginal Parts For Scooters SKU 151-54\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eNumber of Teeth (large gear): 52\u003c\/li\u003e\n\u003cli\u003eNumber of Teeth (small gear): 15\u003c\/li\u003e\n\u003cli\u003eOverall Length: 57mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eChicago Scooter Company go\u003c\/td\u003e\n\u003ctd\u003eChicago Scooter Company go MAX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChicago Scooter Company Bella Classic 50\u003c\/td\u003e\n\u003ctd\u003eChicago Scooter Company Nitro Sport 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChicago Scooter Company Pug 50\u003c\/td\u003e\n\u003ctd\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003e139QMB-based 50cc \/ 80cc engines with the following engine codes:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e139QMA\u003c\/td\u003e\n\u003ctd\u003e139QMB\u003c\/td\u003e\n\u003ctd\u003e1P39QMB\u003c\/td\u003e\n\u003ctd\u003e1P39QMA-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYN139QMB\u003c\/td\u003e\n\u003ctd\u003eJJ1P39QMB\u003c\/td\u003e\n\u003ctd\u003e139FMA-2\u003c\/td\u003e\n\u003ctd\u003eBD1P39QMB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBN139QMB\u003c\/td\u003e\n\u003ctd\u003e147QMD\u003c\/td\u003e\n\u003ctd\u003eOther QMA models\u003c\/td\u003e\n\u003ctd\u003eOther QMB models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cspan\u003eDon't see your engine listed? If the engine code includes \"QM\" or \"FM\", this product is compatible with your vehicle.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eAbout CSC: \u003c\/strong\u003eChicago Scooter Company embodies the spirit of urban mobility with its innovative and stylish lineup of scooters. Designed for city living, their scooters blend functionality, reliability, and modern design, making them the perfect choice for navigating busy streets. Experience the freedom of effortless commuting and explore the city in style with Chicago Scooter Company.\u003c\/span\u003e\u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=15\"\u003eBELLA CLASSIC 50 GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 6\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=154\"\u003eGO MAX GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 6\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=3\"\u003eQMB139 GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 6\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Brand not specified","offers":[{"title":"Default Title","offer_id":67964557525313,"sku":"1100-1322","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6851-0-1100-1322_dc949481-c4a6-421d-a442-1fa1788383d8.jpg?v=1792557842"},{"product_id":"driveshaft-gy50-qmb139","title":"Blue Line 139QMB Gearbox Output Drive Shaft Axle - 155mm","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eBlue Line 155 mm gearbox output drive shaft\u003c\/strong\u003e replaces a worn or damaged shaft in the final-drive gearbox of compatible single-shock 139QMB scooters, helping get your scooter back on the road. Its 16-tooth gear, 22-spline wheel connection, and M10 × 1.25 threaded end provide the key specifications to match against your original shaft.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGearbox output replacement:\u003c\/strong\u003e Transfers drive from the final-drive gearbox to the rear wheel on matching applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-shock configuration:\u003c\/strong\u003e For 139QMB scooters using the 155 mm output-shaft setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16-tooth gear:\u003c\/strong\u003e Match the gear tooth count and profile to your existing gearbox.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e22-spline connection:\u003c\/strong\u003e Provides the rear-wheel interface for a matching wheel hub.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded wheel end:\u003c\/strong\u003e M10 × 1.25 thread specification for matching retaining hardware.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Blue Line\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1100-1323\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart type:\u003c\/strong\u003e Gearbox output drive shaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall length:\u003c\/strong\u003e 155 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel splines:\u003c\/strong\u003e 22\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear teeth:\u003c\/strong\u003e 16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread size:\u003c\/strong\u003e M10 × 1.25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Matching single-shock 139QMB scooters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eRequired configuration\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eChicago Scooter Company go. and go. MAX\u003c\/td\u003e\n\u003ctd\u003eSingle-shock models using a matching 155 mm gearbox output shaft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChinese 139QMB-based 50\/80cc scooters\u003c\/td\u003e\n\u003ctd\u003eSingle-shock configuration, 155 mm shaft, 22 wheel splines, 16 gear teeth and M10 × 1.25 threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelated engine codes\u003c\/td\u003e\n\u003ctd\u003e139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD, and other QMA\/QMB configurations only when the specified shaft and suspension setup match\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eCompare overall length, gear teeth and profile, wheel splines, thread size, bearing and seal journals, and shoulder positions with your original shaft before ordering. This is the 155 mm shaft for the single-shock configuration, not a universal replacement for every 139QMB gearbox. Engine code alone does not establish fitment.\u003c\/p\u003e\u003cp\u003eInspect the mating gears, bearings, seals, and wheel-hub splines during replacement. Assemble and refill the gearbox according to the vehicle manufacturer's service instructions.\u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=154\"\u003eGO MAX GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 13\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=3\"\u003eQMB139 GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 13\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Blue Line","offers":[{"title":"Default Title","offer_id":67964558311745,"sku":"1100-1323","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6852-0-1100-1323_4355dc90-1e27-4598-b5fa-8ccdf2bbbaac.jpg?v=1792557843"},{"product_id":"rear-axle-output-shaft-final-drive-shaft-gy50-qmb139","title":"Blue Line Rear Axle \/ Output Shaft for 139QMB 50cc | 133mm","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eA replacement rear axle (also called output shaft or final drive shaft) for 139QMB-based 50cc 4-stroke scooter engines. Fits Chicago Scooter Company go, go MAX, Bella Classic 50, Pug 50, and Nitro Sport 50, as well as any scooter running a 139QMB or compatible engine code. SKU: 151-55.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect OEM replacement rear axle \/ output shaft \/ final drive shaft\u003c\/li\u003e\n\u003cli\u003e20-spline ends for positive gear engagement\u003c\/li\u003e\n\u003cli\u003eFits 139QMB and compatible 50cc\/80cc 4-stroke engine codes\u003c\/li\u003e\n\u003cli\u003eSKU: 151-55\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect OEM replacement rear axle \/ output shaft \/ final drive shaft\u003c\/li\u003e\n\u003cli\u003e20-spline ends for positive gear engagement\u003c\/li\u003e\n\u003cli\u003eFits 139QMB and compatible 50cc\/80cc 4-stroke engine codes\u003c\/li\u003e\n\u003cli\u003eSKU: 151-55\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eTotal Length: 133mm\u003c\/li\u003e\n\u003cli\u003eSplines: 20 (both ends)\u003c\/li\u003e\n\u003cli\u003eCenter Shaft Diameter: 27mm\u003c\/li\u003e\n\u003cli\u003eSmooth End Diameter: 17mm\u003c\/li\u003e\n\u003cli\u003eThread End Diameter: 16mm\u003c\/li\u003e\n\u003cli\u003eSKU: 151-55\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Engine Codes\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eNote:  There are many different output shafts on the market.   Shafts will vary by model to conform to OEM wheel size, single or dual suspension, etc.  MEASURE your output shaft prior to ordering to make sure this is compatible.\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"4\"\u003e139QMB Engine Codes\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e139QMA\u003c\/td\u003e\n\u003ctd\u003e139QMB\u003c\/td\u003e\n\u003ctd\u003e1P39QMB\u003c\/td\u003e\n\u003ctd\u003e1P39QMA-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYN139QMB\u003c\/td\u003e\n\u003ctd\u003eJJ1P39QMB\u003c\/td\u003e\n\u003ctd\u003e139FMA-2\u003c\/td\u003e\n\u003ctd\u003eBD1P39QMB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBN139QMB\u003c\/td\u003e\n\u003ctd\u003e147QMD\u003c\/td\u003e\n\u003ctd\u003eOther QMA models\u003c\/td\u003e\n\u003ctd\u003eOther QMB models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eChicago Scooter Company \u003c\/td\u003e\n\u003ctd\u003e139QMB 50cc models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTaoTao\u003c\/td\u003e\n\u003ctd\u003e139QMB 50cc models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJonway\u003c\/td\u003e\n\u003ctd\u003e139QMB 50cc models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZNEN\u003c\/td\u003e\n\u003ctd\u003e139QMB 50cc models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWolf Brand Scooters\u003c\/td\u003e\n\u003ctd\u003e139QMB 50cc models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMS\u003c\/td\u003e\n\u003ctd\u003e139QMB 50cc models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIcebear\u003c\/td\u003e\n\u003ctd\u003e139QMB 50cc models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBintelli\u003c\/td\u003e\n\u003ctd\u003e139QMB 50cc models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSSR Motorsports\u003c\/td\u003e\n\u003ctd\u003e139QMB 50cc models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSchwinn\u003c\/td\u003e\n\u003ctd\u003e139QMB 50cc models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003ctd\u003e139QMB\/QMA 50cc 4-stroke scooters w\/ 133mm shafts.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eCalifornia Prop 65 Warning: www.p65warnings.ca.gov\u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=15\"\u003eBELLA CLASSIC 50 GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 8\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=154\"\u003eGO MAX GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 8\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=3\"\u003eQMB139 GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 8\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Brand not specified","offers":[{"title":"Default Title","offer_id":67964558999873,"sku":"1100-1324","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/1100-1324_adbb157a-a4a5-4f04-a3eb-3583a34d43e6.jpg?v=1792793691"},{"product_id":"final-drive-gear-gy50-qmb139","title":"Final Drive Gear; 139QMB","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis final drive gear fits CSC go, go MAX, and Pug50 scooters, as well as bikes running 139QMB engines.  \u003c\/p\u003e\u003cp\u003eOriginal Parts For Scooters SKU 151-272-51t\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eNumber of Splines: 19\u003c\/li\u003e\n\u003cli\u003eInner Diameter (splines peak to peak): 18mm\u003c\/li\u003e\n\u003cli\u003eThickness: 15.7mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eChicago Scooter Company go\u003c\/td\u003e\n\u003ctd\u003eChicago Scooter Company go MAX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChicago Scooter Company Pug50\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003e139QMB-based 50cc \/ 80cc engines with the following engine codes:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e139QMA\u003c\/td\u003e\n\u003ctd\u003e139QMB\u003c\/td\u003e\n\u003ctd\u003e1P39QMB\u003c\/td\u003e\n\u003ctd\u003e1P39QMA-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYN139QMB\u003c\/td\u003e\n\u003ctd\u003eJJ1P39QMB\u003c\/td\u003e\n\u003ctd\u003e139FMA-2\u003c\/td\u003e\n\u003ctd\u003eBD1P39QMB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBN139QMB\u003c\/td\u003e\n\u003ctd\u003e147QMD\u003c\/td\u003e\n\u003ctd\u003eOther QMA models\u003c\/td\u003e\n\u003ctd\u003eOther QMB models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cspan\u003eDon't see your engine listed? If the engine code includes \"QM\" or \"FM\", this product is compatible with your vehicle.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout CSC: \u003c\/strong\u003eChicago Scooter Company embodies the spirit of urban mobility with its innovative and stylish lineup of scooters. Designed for city living, their scooters blend functionality, reliability, and modern design, making them the perfect choice for navigating busy streets. Experience the freedom of effortless commuting and explore the city in style with Chicago Scooter Company.\u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=154\"\u003eGO MAX GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 9\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=3\"\u003eQMB139 GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 9\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Brand not specified","offers":[{"title":"Default Title","offer_id":67964559884609,"sku":"1100-1325","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6854-0-1100-1325_7798b7cd-7930-46c0-bfa0-a27a51dd89cd.jpg?v=1792557845"},{"product_id":"gear-set-1536-gy6-150cc-ncy-brand","title":"NCY 15\/36 Upgear Set - GY6 125\/150cc Scooters","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eLet your GY6 build stretch its legs with the NCY 15\/36 upgear set. Made for compatible 125\/150cc GY6-family transmissions, this two-gear performance upgrade will raise the gearing by 22% compared with a stock 13\/40 set, helping a big-bore setup reach higher top speeds with a more usable rev range. \u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance gearing:\u003c\/strong\u003e 15-tooth countershaft gear and 36-tooth final-drive gear for a taller ratio than the listed stock 13\/40 set.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBig-bore pairing:\u003c\/strong\u003e Helps compatible GY6 performance builds make use of their added power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-gear set:\u003c\/strong\u003e Includes the pictured small countershaft gear and larger splined final-drive gear.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e15-tooth countershaft and 36-tooth final-drive gear set\u003c\/li\u003e\n\u003cli\u003eListed 22% upgear change versus stock 13\/40 set\u003c\/li\u003e\n\u003cli\u003eHigher top speeds and better acceleration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e NCY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountershaft gear:\u003c\/strong\u003e 15 teeth; spline length 24 mm; outer diameter 31.1 mm; overall length 60 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePress-on section:\u003c\/strong\u003e 12.08 mm long × 19.08 mm outer diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd sections:\u003c\/strong\u003e 9–10.5 mm long × 15 mm outer diameter (listing measurement)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal-drive gear:\u003c\/strong\u003e 36 teeth; 19 internal splines; 71.2 mm outer diameter; 18 mm inner diameter; 20 mm width\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference stock gear set:\u003c\/strong\u003e 13\/40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1200-1163\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eListed for compatible GY6-family 125cc, 150cc and 169cc scooter transmissions with the following engine codes. Match your original gear tooth counts, shaft splines and dimensions before ordering; an engine-code prefix by itself does not confirm final-drive fitment.\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e157QMJ\u003c\/td\u003e\n\u003ctd\u003e161QMK\u003c\/td\u003e\n\u003ctd\u003e152QMI\u003c\/td\u003e\n\u003ctd\u003e1P61QMK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYN1P57QMJ\u003c\/td\u003e\n\u003ctd\u003e1P52FMI\u003c\/td\u003e\n\u003ctd\u003e154FMI\u003c\/td\u003e\n\u003ctd\u003eJJ157QMJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1P57QMJ\u003c\/td\u003e\n\u003ctd\u003eBN157QMJ\u003c\/td\u003e\n\u003ctd\u003eBN161QMK-A\u003c\/td\u003e\n\u003ctd\u003eOther QMJ\/QMK\/QMI variants: verify gear dimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eKeep the original 42-tooth countershaft gear for assembly. A press and experienced transmission work are required. Check local rules before use.  This product is intended for off-road use only. This product is not intended for use on public roads or land.\u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=256\"\u003eGY6 TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 17\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964565356865,"sku":"1200-1163","price":55.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/1200-1163_43727dcc-24ba-495b-8a69-8b00ba890124.webp?v=1792993055"},{"product_id":"gear-set-1537-gy6-150cc-ncy-brand","title":"NCY Gear Set (15*37); GY6 150cc","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eGet more speed and a more usable rev range out of your GY6 big bore kit with this 15*37 upgear set from NCY. This kit is a 20% upgear ratio from the stock 13*40 gear set. \u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFront Counter Shaft Teeth: 15\u003c\/li\u003e\n\u003cli\u003eFront Counter Shaft Dimensions: Spline L: 24mm, OD: 31.1mm, Overall L: 60mm\u003c\/li\u003e\n\u003cli\u003eGear Press-On Area L: 12.08mm x OD: 19.08mm, Ends L: 9\u0026lt;10.5mm x OD: 15mm\u003c\/li\u003e\n\u003cli\u003eRear Final Drive Gear Teeth: 37\u003c\/li\u003e\n\u003cli\u003eInner Spline: 19, OD: 71.2mm, ID: 18mm, W: 20mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e You're going to need access to a 12-ton hydraulic compressor to remove the stock counter shaft gear from the counter shaft, and then again to re-press the new NCY counter shaft gear.\u003c\/p\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003e157QMJ-based 125cc \/ 150cc \/ 169cc engines with the following engine codes:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e157QMJ\u003c\/td\u003e\n\u003ctd\u003e161QMK\u003c\/td\u003e\n\u003ctd\u003e152QMI\u003c\/td\u003e\n\u003ctd\u003e1P61QMK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYN1P57QMJ\u003c\/td\u003e\n\u003ctd\u003e1P52FMI\u003c\/td\u003e\n\u003ctd\u003e154FMI\u003c\/td\u003e\n\u003ctd\u003eJJ157QMJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1P57QMJ\u003c\/td\u003e\n\u003ctd\u003eBN157QMJ\u003c\/td\u003e\n\u003ctd\u003eBN161QMK-A\u003c\/td\u003e\n\u003ctd\u003eOther QMJ, QMK, and QMI models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eDon't see your engine listed? If the engine code includes \"QM\" or \"FM\", this product is compatible with your vehicle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout NCY:\u003c\/strong\u003e NCY is the aftermarket performance parts leader for most popular scooter brands including Honda, Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6 \/ QMB powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified.\u003c\/p\u003e\u003cp\u003eMade in Taiwan.\u003c\/p\u003e\u003ch4\u003eThis product is intended for off-road use only.\u003c\/h4\u003e\u003ch4\u003eThis product is not intended for use on public roads or land.\u003c\/h4\u003e\u003ch4\u003eThis product is not legal for use in California on pollution-controlled vehicles. Check local laws before installing.\u003c\/h4\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=256\"\u003eGY6 TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 17\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964566110529,"sku":"1200-1164","price":60.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/1200-1164_c3e72398-caf6-4ee9-9ef5-85692778b577.webp?v=1792993056"},{"product_id":"gear-set-1538-gy6-150cc-ncy-brand","title":"NCY GY6 Up-Gear Kit 15*38 | Increase Top Speed","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eUnlock more top speed and a more usable rev range from your GY6 engine with the \u003cstrong\u003eNCY 15?38 Up-Gear Kit\u003c\/strong\u003e. This gear set delivers an \u003cstrong\u003e18% increase in final drive ratio\u003c\/strong\u003e over the stock 13?40 setup — the ideal companion for a big bore kit or any build chasing higher top-end performance. ISO 9001 certified and made in Taiwan by NCY since 1997.\u003c\/p\u003e\u003cblockquote\u003e\n\u003cstrong\u003eInstallation Note:\u003c\/strong\u003e You must reuse the stock 42-tooth counter shaft gear. A 50-ton gear press is required for installation.\u003c\/blockquote\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e18% final drive ratio increase over stock 13*38 gear set\u003c\/li\u003e\n\u003cli\u003eIncreases top speed and widens usable rev range\u003c\/li\u003e\n\u003cli\u003eIdeal companion for big bore kit builds\u003c\/li\u003e\n\u003cli\u003eISO 9001 certified — Made in Taiwan by NCY since 1997\u003c\/li\u003e\n\u003cli\u003eRequires reuse of stock 42-tooth counter shaft gear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront Counter Shaft:\u003c\/strong\u003e 15 teeth | Spline L: 24mm | OD: 31.1mm | Overall L: 60mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear Press-On Area:\u003c\/strong\u003e L: 12.08mm × OD: 19.08mm | Ends L: 9–10.5mm × OD: 15mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Final Drive Gear:\u003c\/strong\u003e 38 teeth | Inner Spline: 19\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Gear Dimensions:\u003c\/strong\u003e OD: 71.2mm | ID: 18mm | W: 20mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRatio Increase:\u003c\/strong\u003e 18% over stock 13?40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in Taiwan by NCY (ISO 9001)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eFits \u003cstrong\u003e157QMJ-based 125cc, 150cc, and 169cc engines\u003c\/strong\u003e with the following engine codes:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eEngine Code\u003c\/th\u003e\n\u003cth\u003eEngine Code\u003c\/th\u003e\n\u003cth\u003eEngine Code\u003c\/th\u003e\n\u003cth\u003eEngine Code\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e157QMJ\u003c\/td\u003e\n\u003ctd\u003e161QMK\u003c\/td\u003e\n\u003ctd\u003e152QMI\u003c\/td\u003e\n\u003ctd\u003e1P61QMK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYN1P57QMJ\u003c\/td\u003e\n\u003ctd\u003e1P52FMI\u003c\/td\u003e\n\u003ctd\u003e154FMI\u003c\/td\u003e\n\u003ctd\u003eJJ157QMJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1P57QMJ\u003c\/td\u003e\n\u003ctd\u003eBN157QMJ\u003c\/td\u003e\n\u003ctd\u003eBN161QMK-A\u003c\/td\u003e\n\u003ctd\u003eOther QMJ \/ QMK \/ QMI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cblockquote\u003e\u003c\/blockquote\u003e\u003cp\u003e\u003cstrong\u003ePerformance Note:\u003c\/strong\u003e This product is intended for off-road use only and is not intended for use on public roads. Not legal for use in California on pollution-controlled vehicles — check local laws before installing.\u003c\/p\u003e\u003cp\u003eCalifornia Prop 65 Warning: www.p65warnings.ca.gov\u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=256\"\u003eGY6 TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 17\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964566765889,"sku":"1200-1165","price":60.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/1200-1165_b639e3b3-d003-488b-9b08-22c8b48b26dc.webp?v=1792993056"},{"product_id":"gear-set-1636-gy6-150cc-ncy-brand","title":"NCY Gear Set (16*36); GY6 150cc","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eGet more speed and a more usable rev range out of your GY6 big bore kit with this 16*36 upgear set from NCY. This kit is a 27% upgear from the stock 13*40 gear set. \u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFront Counter Shaft Teeth: 16 \/ Spline L: 24mm \/ OD: 31.1mm \/ Overall L: 60mm\u003c\/li\u003e\n\u003cli\u003eGear Press-On Area L: 12.08mm x OD: 19.08mm \/ Ends L: 9\u0026lt;10.5mm x OD: 15mm\u003c\/li\u003e\n\u003cli\u003eRear Final Drive Gear Teeth: 36 \/ Inner Spline: 19\u003c\/li\u003e\n\u003cli\u003eOD: 71.2mm \/ ID: 18mm \/ W: 20mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e You're going to need access to a 12-ton hydraulic compressor to remove the stock counter shaft gear from the counter shaft, and then again to re-press the new NCY counter shaft gear.\u003c\/p\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003e157QMJ-based 125cc \/ 150cc \/ 169cc engines with the following engine codes:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e157QMJ\u003c\/td\u003e\n\u003ctd\u003e161QMK\u003c\/td\u003e\n\u003ctd\u003e152QMI\u003c\/td\u003e\n\u003ctd\u003e1P61QMK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYN1P57QMJ\u003c\/td\u003e\n\u003ctd\u003e1P52FMI\u003c\/td\u003e\n\u003ctd\u003e154FMI\u003c\/td\u003e\n\u003ctd\u003eJJ157QMJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1P57QMJ\u003c\/td\u003e\n\u003ctd\u003eBN157QMJ\u003c\/td\u003e\n\u003ctd\u003eBN161QMK-A\u003c\/td\u003e\n\u003ctd\u003eOther QMJ, QMK, and QMI models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eDon't see your engine listed? If the engine code includes \"QM\" or \"FM\", this product is compatible with your vehicle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout NCY:\u003c\/strong\u003e NCY is the aftermarket performance parts leader for most popular scooter brands including Honda, Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6 \/ QMB powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified.\u003c\/p\u003e\u003cp\u003eMade in Taiwan.\u003c\/p\u003e\u003ch4\u003eThis product is intended for off-road use only.\u003c\/h4\u003e\u003ch4\u003eThis product is not intended for use on public roads or land.\u003c\/h4\u003e\u003ch4\u003eThis product is not legal for use in California on pollution-controlled vehicles. Check local laws before installing.\u003c\/h4\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=256\"\u003eGY6 TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 17\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964567585089,"sku":"1200-1166","price":60.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-7061-0-1200-1166_24f440cc-4fd9-4927-b4ae-acf2a348b9c8.jpg?v=1792557853"},{"product_id":"gear-set-1638-gy6-150cc-ncy-brand","title":"NCY Upgear Set 16x38 for GY6 125cc\/150cc Engines","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eExtract more top speed and a wider, more usable rev range from your GY6 big bore build with the NCY 16x38 upgear set. This kit is a 23% upgear over the stock 13x40 gear set, shifting the power band for improved high-speed performance. Includes countershaft gear (16T) and final drive gear (38T). Compatible with 157QMJ-based 125cc, 150cc, and 169cc engines across most Chinese GY6 scooters.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e A 12-ton hydraulic press is required to remove the stock counter shaft gear and press the new NCY gear onto the counter shaft. Professional installation is strongly recommended.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e23% upgear over stock 13x40 ratio — increases top speed and extends rev range\u003c\/li\u003e\n\u003cli\u003e16-tooth counter shaft gear + 38-tooth final drive gear included\u003c\/li\u003e\n\u003cli\u003eIdeal companion for GY6 big bore kits (150cc, 169cc, and larger)\u003c\/li\u003e\n\u003cli\u003eFits 157QMJ-based 125cc\/150cc\/169cc engines and all QMJ\/QMI\/QMK variants\u003c\/li\u003e\n\u003cli\u003eRequires 12-ton hydraulic press for counter shaft gear removal and installation\u003c\/li\u003e\n\u003cli\u003eISO 9001 certified | Made in Taiwan by NCY\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrand: NCY\u003c\/li\u003e\n\u003cli\u003eSKU: 1200-1168 | MPN: 658A13VENTO1638\u003c\/li\u003e\n\u003cli\u003eRatio: 16x38 (23% upgear over stock 13x40)\u003c\/li\u003e\n\u003cli\u003eFront Counter Shaft Teeth: 16\u003c\/li\u003e\n\u003cli\u003eCounter Shaft Dimensions: Spline L: 24mm, OD: 31.1mm, Overall L: 60mm\u003c\/li\u003e\n\u003cli\u003eGear Press-On Area: L 12.08mm x OD 19.08mm; Ends L: 9–10.5mm x OD: 15mm\u003c\/li\u003e\n\u003cli\u003eRear Final Drive Gear Teeth: 38\u003c\/li\u003e\n\u003cli\u003eFinal Drive Gear: Inner Spline: 19, OD: 71.2mm, ID: 18mm, W: 20mm\u003c\/li\u003e\n\u003cli\u003eMade in Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003e157QMJ-based 125cc \/ 150cc \/ 169cc engines with the following engine codes:\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e157QMJ\u003c\/td\u003e\n\u003ctd\u003e161QMK\u003c\/td\u003e\n\u003ctd\u003e152QMI\u003c\/td\u003e\n\u003ctd\u003e1P61QMK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYN1P57QMJ\u003c\/td\u003e\n\u003ctd\u003e1P52FMI\u003c\/td\u003e\n\u003ctd\u003e154FMI\u003c\/td\u003e\n\u003ctd\u003eJJ157QMJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1P57QMJ\u003c\/td\u003e\n\u003ctd\u003eBN157QMJ\u003c\/td\u003e\n\u003ctd\u003eBN161QMK-A\u003c\/td\u003e\n\u003ctd\u003eOther QMJ, QMK, and QMI models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eDon't see your engine listed? If the engine code includes \"QM\" or \"FM\" and is 125cc–200cc, this product is likely compatible with your vehicle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOff-Road Use Only.\u003c\/strong\u003e This product is not intended for use on public roads. Not legal for use in California on pollution-controlled vehicles. Check local laws before installing. Performance upgrades are considered racing parts and are not covered under warranty.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=256\"\u003eGY6 TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 17\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964568404289,"sku":"1200-1168","price":60.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/1200-1168_e6d3b586-9073-40c6-82ce-856b5026b1cc.jpg?v=1792793705"},{"product_id":"transmission-set-gy6-49cc-qmb139-buddy-50-roughhouse-ncy-brand","title":"NCY Super Transmission Kit - 139QMB \u0026 Genuine 50cc","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eNCY Super Transmission kit\u003c\/strong\u003e is the coordinated CVT performance upgrade for Honda Dio, other models using Dio transmission components, Kymco Agility 50 and Filly 50, and compatible Genuine 50cc and 139QMB scooter applications. Quicker acceleration, responsive downshifting and tunable cruising performance bring more life to your build, with an adjustable torque-driver sheave, NCY Bearing Spring Seat, matched clutch components, and three roller-weight sets to dial in the response.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight, low-friction drive components:\u003c\/strong\u003e The ultralight drive face supports quicker RPM pickup where compatible, while the coated Golden Pulley and pressure plate promote smooth shifting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance clutch and bell:\u003c\/strong\u003e High-friction shoes and a vented bell support positive engagement and heat dissipation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree roller-weight options:\u003c\/strong\u003e Six each of 7g, 8g and 9g rollers let you tune CVT response to the engine and rider.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1000 RPM compression spring:\u003c\/strong\u003e Supports responsive downshifting during deceleration and hill climbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable torque-driver sheave:\u003c\/strong\u003e Choose the three straight grooves for quicker takeoff or the three bent grooves for higher top-speed tuning, tailoring CVT acceleration to your needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNCY Bearing Spring Seat:\u003c\/strong\u003e A ball-bearing track lets the torque spring rotate freely instead of binding against the clutch pulleys, reducing friction and acceleration dead spots for smoother back-shifting and snappier throttle response.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e NCY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1200-1171\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 999A01DIOR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit type:\u003c\/strong\u003e Super Transmission performance CVT kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoller dimensions:\u003c\/strong\u003e 16 × 13 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded roller sets:\u003c\/strong\u003e 7g, 8g and 9g, six rollers per set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal rollers:\u003c\/strong\u003e 18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression spring:\u003c\/strong\u003e 1000 RPM rating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClutch:\u003c\/strong\u003e NCY performance, non-adjustable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque-driver sheave:\u003c\/strong\u003e Adjustable, with three straight grooves and three bent grooves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring seat:\u003c\/strong\u003e NCY Bearing Spring Seat with ball-bearing track\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKit Contents\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNCY ultralight outer drive face\u003c\/li\u003e\n\u003cli\u003eCoated Golden Pulley variator and pressure plate\u003c\/li\u003e\n\u003cli\u003eSecondary pulley assembly with adjustable torque-driver sheave\u003c\/li\u003e\n\u003cli\u003eNCY performance clutch and vented clutch bell\u003c\/li\u003e\n\u003cli\u003eNCY Bearing Spring Seat\u003c\/li\u003e\n\u003cli\u003eThree sets of 16 × 13 mm tuning rollers, 7g\/8g\/9g\u003c\/li\u003e\n\u003cli\u003e1000 RPM compression spring and accompanying small components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eFitment requirements\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda Dio and other models using Dio transmission components\u003c\/td\u003e\n\u003ctd\u003eMatching Dio transmission configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKymco Agility 50 and Filly 50\u003c\/td\u003e\n\u003ctd\u003eCompatible transmission applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGenuine Buddy 50 and RoughHouse 50\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eReuse the original OEM outer drive face for clearance\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e139QMB \/ QMB139 and related GY6 50cc platforms\u003c\/td\u003e\n\u003ctd\u003eCompatible TaoTao, Wolf, Chicago Scooter Company Go\/Go Max and Icebear applications; compare the installed CVT components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSYM \/ ADLY applications\u003c\/td\u003e\n\u003ctd\u003eCompatible Fiddle 50, Jet 50 and Fox 50 configurations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e147QMD and big-bore 139QMB applications\u003c\/td\u003e\n\u003ctd\u003eCompatible 80cc builds retaining the matching small-engine CVT configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eConfirm the engine and installed transmission configuration before ordering. Model name or displacement alone does not establish fitment.\u003c\/p\u003e\u003ch3\u003eInstallation and Tuning\u003c\/h3\u003e\u003cp\u003eUse the adjustable torque-driver sheave to tailor CVT response: its three straight grooves favor quicker takeoff, while its three bent grooves favor higher top speed. Select the groove style to suit your riding goals, then tune the rollers to complement it.\u003c\/p\u003e\u003cp\u003eStart with the 8g rollers as a tuning baseline, then evaluate engine RPM and response under load. The 7g set offers a lighter-weight option for acceleration-focused tuning; results depend on the engine, belt and overall setup. Inspect the drive belt during installation and replace it with the correct application-specific belt if worn.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/files\/1200-1171.pdf?v=1697200017\" title=\"NCY 1200-1171 installation instructions\"\u003eDownload installation instructions\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003cstrong\u003eThis product is intended for off-road use only. This product is not intended for use on public roads or land.\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003eManuals\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/files\/1200-1171.pdf?v=1697200017\"\u003eDownload installation instructions\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=266\"\u003eGO MAX TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 12\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964569157953,"sku":"1200-1171","price":239.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-7063-0-1200-1171_a6f4963a-93e5-42d3-8a57-a50d64377409.jpg?v=1792557855"},{"product_id":"4th-gear-v5b","title":"4th Gear; V5B","description":"\u003cp\u003eStandard 4th gear for V5B model vintage Vespa 50 (V5B model) scooters with manual transmissions.\u003c\/p\u003e","brand":"Mec Eur","offers":[{"title":"Default Title","offer_id":67964579348801,"sku":"165451","price":58.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6343-0-165451_4e310501-e67c-4061-84ec-8fe7f2131ab1.jpg?v=1792557868"},{"product_id":"ncy-performance-super-transmission-set-yamaha-zuma-50-2t","title":"NCY Performance Super Transmission Kit - Yamaha Zuma 50 2T","description":"\u003cp\u003eThis \u003cstrong\u003eNCY Super Transmission Kit\u003c\/strong\u003e brings sharper acceleration, reduced bog and a higher top-end ceiling to your Yamaha Zuma 50 2T, Jog 50 or compatible E-TON 50cc two-stroke. Instead of chasing performance one component at a time, upgrade the major CVT components together with matched NCY racing parts. Feel a stronger pull as you accelerate, smoother power delivery through the rev range and more freedom to dial in the response that makes your scooter fun to ride.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete performance upgrade:\u003c\/strong\u003e Matched variator, drive face, clutch, clutch bell, secondary slider, rollers and compression spring improve acceleration, reduce bog and raise the top-end ceiling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGen 4 racing clutch:\u003c\/strong\u003e The green large-shoe clutch pairs generous friction pads with red springs for performance-focused engagement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooler, cleaner clutch operation:\u003c\/strong\u003e The PTFE-coated star-vented racing bell promotes heat dissipation and resists glazing, helping maintain consistent engagement through repeated acceleration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltralight outer drive face:\u003c\/strong\u003e Bronze-anodized construction reduces rotating mass for a more responsive CVT setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmoother power delivery:\u003c\/strong\u003e NCY's dual-range secondary slider eliminates the flat spot, while the yellow 1500 RPM compression spring provides stiffer secondary engagement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree tuning options included:\u003c\/strong\u003e Six rollers each in 5g, 6g and 7g let you tailor CVT response to your riding style and engine build without purchasing three separate roller sets.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKit Contents\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNCY CVT variator\u003c\/li\u003e\n\u003cli\u003eNCY ultralight bronze-anodized outer drive face\u003c\/li\u003e\n\u003cli\u003eNCY Gen 4 large-shoe racing clutch, green with red springs\u003c\/li\u003e\n\u003cli\u003eNCY PTFE-coated star-vented racing clutch bell\u003c\/li\u003e\n\u003cli\u003eNCY dual-range secondary slider\u003c\/li\u003e\n\u003cli\u003eNCY 15x12mm roller weights: 5g, 6g and 7g sets, six rollers per set\u003c\/li\u003e\n\u003cli\u003eNCY yellow 1500 RPM compression spring\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e NCY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1200-1197\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Yamaha-based horizontal Minarelli two-stroke CVT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoller dimensions:\u003c\/strong\u003e 15mm diameter x 12mm width\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoller weights:\u003c\/strong\u003e 5g, 6g and 7g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal rollers:\u003c\/strong\u003e 18, six per weight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression spring:\u003c\/strong\u003e 1500 RPM, yellow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eNote: Does NOT fit 1st Gen (pre-2002) Zumas or 4-stroke Zuma 50F models.\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eYears \/ Notes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eZuma 50 (2T)\u003c\/td\u003e\n\u003ctd\u003e2002–2011 bugeye models only, not pre-2002 or 4T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eJog 50\u003c\/td\u003e\n\u003ctd\u003eAll two-stroke horizontal Minarelli models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eE-TON\u003c\/td\u003e\n\u003ctd\u003eBeamer II, Beamer III, Matrix 50\u003c\/td\u003e\n\u003ctd\u003eTwo-stroke models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTuning tip:\u003c\/strong\u003e Use light Molybdenum (Moly) grease only on clutch sheave slider pins. Keep belt surface and variator ramps clean and dry. Pair with a quality drive belt for best results.\u003c\/p\u003e\u003cp\u003eNot intended for use on public roads or land. Not legal for use in California on pollution-controlled vehicles — check local laws before installing.\u003c\/p\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964579414337,"sku":"1200-1197","price":315.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-7081-0-1200-1197_314fe776-157f-40e2-b8fe-643f3817d50b.jpg?v=1792557868"},{"product_id":"cush-drive-spindle-nos-vsb","title":"Cush Drive Spindle (NOS); VSB","description":"\u003cp\u003eCush Drive Spindle (NOS); VSB\u003c\/p\u003e","brand":"Brand not specified","offers":[{"title":"Default Title","offer_id":67964584853825,"sku":"93415","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-8672-0-93415_09e854d5-98da-4e22-bccf-3bedd5a35797.jpg?v=1792557912"},{"product_id":"counter-balance-countershaft-gy6","title":"Counter Balance Countershaft: GY6","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eCountershaft on GY6 125 - 150cc engines.\u003c\/p\u003e\u003cp\u003eOriginal Parts For Scooters SKU 164-131\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eNumber of Teeth (large gear): 42\u003c\/li\u003e\n\u003cli\u003eNumber of Teeth (small gear): 13\u003c\/li\u003e\n\u003cli\u003eShaft Diameter: 15mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003e157QMJ-based 125cc \/ 150cc \/ 169cc engines with the following engine codes:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e157QMJ\u003c\/td\u003e\n\u003ctd\u003e161QMK\u003c\/td\u003e\n\u003ctd\u003e152QMI\u003c\/td\u003e\n\u003ctd\u003e1P61QMK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYN1P57QMJ\u003c\/td\u003e\n\u003ctd\u003e1P52FMI\u003c\/td\u003e\n\u003ctd\u003e154FMI\u003c\/td\u003e\n\u003ctd\u003eJJ157QMJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1P57QMJ\u003c\/td\u003e\n\u003ctd\u003eBN157QMJ\u003c\/td\u003e\n\u003ctd\u003eBN161QMK-A\u003c\/td\u003e\n\u003ctd\u003eOther QMJ, QMK, and QMI models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eDon't see your engine listed? If the engine code includes \"QM\" or \"FM\", this product is compatible with your vehicle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout AZScooterParts: \u003c\/strong\u003eSince the beginning in 1989, AZScooterParts has become a major supplier of parts and accessories for vintage and modern scooters. We have everything you need, from wear-and-tear items like tires and oil filters to after-market parts from brands like Malossi, NCY, Prima, YSS, Dr. Pulley, and more.\u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=256\"\u003eGY6 TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 4\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"Brand not specified","offers":[{"title":"Default Title","offer_id":67964585148737,"sku":"1100-1154","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-8733-0-1100-1154_1.jpg?v=1792557912"},{"product_id":"8-transmission-upgrade-p200e","title":"8% Transmission Upgrade; P200E","description":"\u003cp\u003eMalossi primary gear upgrade for P200. replaces your clutch gear and outer ring gear from your cush drive with new straight cut versions. This kit will raise your gearing approx. 8% over stock.\u003c\/p\u003e","brand":"Malossi","offers":[{"title":"Default Title","offer_id":67964585509185,"sku":"MTU3","price":224.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-8024-0-MTU3_5ce54ca5-5b9f-4f64-ab22-31e4b922c1b3.jpg?v=1792557913"},{"product_id":"final-drive-gear-gy6","title":"Final Drive Gear; GY6","description":"\u003ch2\u003eDescription\u003c\/h2\u003eFinal gear on GY6 125 - 150cc engines. \n\n\u003cp\u003e\n\nCirclip sold seperately 1100-1210\u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=256\"\u003eGY6 TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 6\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"Blue Line","offers":[{"title":"Default Title","offer_id":67964585869633,"sku":"1100-1156","price":21.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-8734-0-1100-1156_8d66b23d-7f8d-4ee0-b01c-df9bcd65bc64.jpg?v=1792557913"},{"product_id":"gear-3rd-vsx","title":"Gear, 3rd - VSX","description":"\u003cp\u003eStandard third gear for P200 VSX.\u003c\/p\u003e","brand":"Mec Eur","offers":[{"title":"Default Title","offer_id":67964585836865,"sku":"152806","price":58.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-8617-0-152806_e9a4be18-1714-4112-ae0d-765d484de336.jpg?v=1792557913"},{"product_id":"oil-mixer-drive-gear-vespa-p-px","title":"Oil Mixer Drive Gear; Vespa P\/PX","description":"\u003cp\u003eOil mixer for drive gear kit for P\/PX series (VLX, VNX, and VSX model) Vespa scooters.\u003c\/p\u003e","brand":"Mec Eur","offers":[{"title":"Default Title","offer_id":67964587114817,"sku":"498469","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-8621-0-498469_79cdbcb6-c235-4636-91ec-e53e56e5b3ef.jpg?v=1792557915"},{"product_id":"clutch-gear-assembly-includes-crank-gear-v9a-primaries","title":"Clutch Gear Assembly (Includes Crank Gear); V9A (primaries)","description":"\u003cp\u003e63 Tooth Clutch Gear Assembly\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cp\u003eOuter Diameter: 115 mm\u003cbr\u003eInner Diameter: 15 mm\u003cbr\u003eSpline Count: 63\u003c\/p\u003e","brand":"Mec Eur","offers":[{"title":"Default Title","offer_id":67964588261697,"sku":"99406","price":114.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-8682-0-99406_87147d7e-7a7d-4d06-810c-fbefb6c9de83.jpg?v=1792557916"},{"product_id":"gear-2nd-vespa-sf","title":"Gear (2nd); Vespa SF","description":"\u003cp\u003eStandard 2nd gear for vintage Vespa small frame scooters with manual transmission.\u003c\/p\u003e","brand":"Mec Eur","offers":[{"title":"Default Title","offer_id":67964592292161,"sku":"134904","price":62.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-8423-0-134904_619dd86a-1249-4cc4-8ff0-8778bd74e222.jpg?v=1792557921"},{"product_id":"reduction-gear-engine-gy6-chinese","title":"Reduction Gear (Engine); GY6, Chinese","description":"\u003ch2\u003eDescription\u003c\/h2\u003eReduction gear for GY6 125-150cc engines. \n\n\u003cp\u003e\n\nHigh quality replacement part for Chinese engines.\u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=255\"\u003eGY6 STARTER\u003c\/a\u003e \u003cspan\u003eCallout 3\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"Blue Line","offers":[{"title":"Default Title","offer_id":67964594684225,"sku":"1100-1130","price":21.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-8639-0-1100-1130_daf6e53d-01c7-489c-8729-6edd21927a3b.jpg?v=1792557923"},{"product_id":"ncy-gear-wheel-1436-37-38gy6-magento-8937","title":"NCY Performance Up-Gear Kit 14*36\/37\/38 | GY6 GY7","description":"\u003cp\u003eFine-tune your GY6's final drive ratio with an \u003cstrong\u003eNCY 14-tooth Counter Shaft Gear Wheel\u003c\/strong\u003e. Available in three driven gear options — 36, 37, or 38 teeth — this single gear change lets you shift the balance between top speed and off-the-line acceleration without splitting the cases. Fits both A-block (54mm) and B-block (57mm) GY6 engine families. ISO 9001 certified and made in Taiwan by NCY since 1997.\u003c\/p\u003e\u003ch2\u003eChoosing Your Gear Ratio\u003c\/h2\u003e\u003cp\u003eThe stock GY6 150cc final drive is typically a 14?40 combination. Swapping the driven gear changes the ratio and shifts the power delivery:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eGear Option\u003c\/th\u003e\n\u003cth\u003eRatio vs. Stock 14?40\u003c\/th\u003e\n\u003cth\u003eEffect\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e14?36\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eShorter (numerically lower)\u003c\/td\u003e\n\u003ctd\u003eHigher top speed, reduced low-end torque and acceleration. Best for flat roads and top-speed builds.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e14?37\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSlightly shorter than stock\u003c\/td\u003e\n\u003ctd\u003eBalanced upgrade — modest top speed gain with minimal sacrifice in acceleration. Good all-around street tune.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e14?38\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eClose to stock\u003c\/td\u003e\n\u003ctd\u003eNear-stock ratio with slightly improved top speed over a 40T gear. Ideal for mild tuning or replacing a worn gear.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cblockquote\u003e\n\u003cstrong\u003eTip:\u003c\/strong\u003e Going to a lower tooth count (36T) raises top speed but means your engine will be spinning closer to its rev limit at speed. Pair with a big bore kit or performance exhaust to make the most of the taller ratio. 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