{"title":"GY6, 139QMB, 49cc Performance Parts","description":"\u003cp\u003e\u003cbr\u003eHigh performance scooter parts for GY6, 139QMB, 49cc scooter engine. Choose from top brands like NCY, TWH, KOSO and many more.\u003cbr\u003e\u003cbr\u003e \u003c\/p\u003e","products":[{"product_id":"big-bore-cylinder-kit-w-head-72cc-13mm-pin-qmb139","title":"Blue Line Big Bore Kit w\/ Head 4T (72cc, 64mm Valves); 139QMB","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eBlue Line Complete 72cc High-Performance Big Bore Cylinder Kit for 50cc 4-stroke 139QMB engines.\u003c\/p\u003e\u003cp\u003eOriginal Parts For Scooters SKU 151-280-47mm\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNOTE: \u003c\/strong\u003eBefore ordering, remove the valve from your scooter's head and measure the full length of the valve stem. This kit works with 64mm valves. If your scooter has 69mm valves, you'll need the following 69mm big bore kit.\u003c\/p\u003e\u003cp\u003ePump up that weak engine to a respectable 72cc displacement, on a budget. This kit is not intended to make your scoot a screaming race machine. It is intended to get you that extra power you need. (Most Chinese 50cc's only put down around 1.5hp to the ground.)\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e1 - Head Assembly with 64mm valves\u003c\/li\u003e\n\u003cli\u003e1 - Iron Cylinder with 47mm bore\u003c\/li\u003e\n\u003cli\u003e1 - Piston with Rings (Not Pictured)\u003c\/li\u003e\n\u003cli\u003e1 - Wrist Pin \u003c\/li\u003e\n\u003cli\u003e2 - Circlips\u003c\/li\u003e\n\u003cli\u003e2 - Exhaust studs\u003c\/li\u003e\n\u003cli\u003e2 - Intake Studs\u003c\/li\u003e\n\u003cli\u003e1 - Base Gasket\u003c\/li\u003e\n\u003cli\u003e1 - Head Gasket\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\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 Blue Line:\u003c\/strong\u003e Blue Line offers OEM equivalent replacement parts for on-road scooters. Blue Line parts are a direct-fit replacement when OEM parts are unavailable or overly expensive for your scooter. Since 2018, Blue Line has provided quality parts at great prices.\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=72\"\u003eGO MAX CYLINDER CRANKSHAFT\u003c\/a\u003e \u003cspan\u003eCallout 13\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"BLUE LINE","offers":[{"title":"Default Title","offer_id":67964553298241,"sku":"1100-1439","price":80.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6896-0-1100-1439_07c09516-58c3-4fca-b4a1-a673588c7138.jpg?v=1792557837"},{"product_id":"cylinder-kit-81cc-iron-gy6-49cc-qmb139-ncy-brand","title":"NCY 50mm Big-Bore Cylinder Kit - 139QMB 50cc to 81cc","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eNCY big-bore cylinder kit\u003c\/strong\u003e is the displacement upgrade for compatible 139QMB \/ QMB139 four-stroke scooters, taking the original 50cc platform to \u003cstrong\u003e81cc with a 50mm bore and the standard crankshaft stroke\u003c\/strong\u003e. Give your scooter more go with a cast-iron cylinder and matching piston assembly built for your next performance project. This is a big-bore conversion, not a standard-bore replacement, and the cylinder head is not included.  No case cutting required!\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore Displacement:\u003c\/strong\u003e A 50mm bore produces 81cc using the standard stroke, without requiring a stroker crankshaft to achieve that displacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e139QMB Performance Upgrade:\u003c\/strong\u003e A bolt-on cylinder upgrade for matching GY6 50 \/ 139QMB four-stroke builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCast-Iron Cylinder:\u003c\/strong\u003e Replacement cylinder with cooling fins for the air-cooled engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatched Piston Components:\u003c\/strong\u003e Includes piston, piston rings, wrist pin and retaining clips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket Set Included:\u003c\/strong\u003e Head and base gaskets accompany the cylinder and piston components.\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 1100-1237\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 603C02GY650\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit type:\u003c\/strong\u003e Big-bore cylinder conversion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine platform:\u003c\/strong\u003e 139QMB \/ QMB139, GY6 50 four-stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e 50mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e 81cc with standard stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder:\u003c\/strong\u003e Cast iron, air-cooled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded:\u003c\/strong\u003e Cylinder, piston, rings, wrist pin, retaining clips, head gasket and base gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder head:\u003c\/strong\u003e Not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eCompatible with 139QMB \/ QMB139 (GY6 50) four-stroke scooters being converted from the original 50cc configuration to a 50mm big-bore setup.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHead compatibility matters:\u003c\/strong\u003e Most stock cylinder heads will not fit this kit. The supplier recommends the NCY 50mm big-valve performance cylinder head, 1100-1239, sold separately. Confirm the installed engine configuration and matching head before assembly.\u003c\/p\u003e\u003ch3\u003eRecommended Performance Pairings\u003c\/h3\u003e\u003cp\u003ePair the kit with the NCY Performance Camshaft, 1100-1250, sold separately, to help the bigger cylinder reach its full performance potential. The original performance pairing targets 50–55 MPH; actual speed depends on the complete engine, tuning, gearing, rider load and riding conditions, rather than the cylinder kit alone.\u003c\/p\u003e\u003cp\u003eThe supplier recommends the NCY Oil Decompression Tube Assembly, 1100-1282, sold separately. It replaces the dipstick and allows excess crankcase pressure to be released, making it a useful companion to a cylinder-kit upgrade.\u003c\/p\u003e\u003cp\u003eNot legal for use in California on pollution-controlled vehicles. Check local laws before installing.\u003c\/p\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\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=72\"\u003eGO MAX CYLINDER CRANKSHAFT\u003c\/a\u003e \u003cspan\u003eCallout 13\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964554805569,"sku":"1100-1237","price":129.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/1100-1237_81c9ea5e-2ef8-4198-b556-c5ba8ef1baa1.jpg?v=1792993066"},{"product_id":"cylinder-head-81cc-alloy-performance-gy6-49cc-qmb139-ncy-brand","title":"NCY 139QMB Performance Cylinder Head 81cc 50mm","description":"\u003cp\u003eThe NCY 81cc Aluminum Performance Cylinder Head is a direct upgrade for 50cc 139QMB-based engines. Pair it with NCY's 81cc Cylinder Kit to push past stock displacement and gain the power needed for city traffic and hills.\u003c\/p\u003e\u003cp\u003eMade in Taiwan. ISO 9001 certified. NCY has been the aftermarket performance leader for popular scooter platforms since 1997.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e81cc alloy performance cylinder head for 139QMB \/ GY6 50cc engines\u003c\/li\u003e\n\u003cli\u003e50mm stud spacing — direct fit for QMB\/QMA engine families\u003c\/li\u003e\n\u003cli\u003e64mm valve stem height — requires 64mm rocker arm assembly (not included)\u003c\/li\u003e\n\u003cli\u003e6mm intake and exhaust threads\u003c\/li\u003e\n\u003cli\u003eISO 9001 certified manufacturing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStud Spacing: 50mm\u003c\/li\u003e\n\u003cli\u003eHead Height: 60mm\u003c\/li\u003e\n\u003cli\u003eIntake Port: 24mm\u003c\/li\u003e\n\u003cli\u003eExhaust Port: 22mm\u003c\/li\u003e\n\u003cli\u003eIntake Valve: 21.5 x 64mm\u003c\/li\u003e\n\u003cli\u003eExhaust Valve: 19 x 64mm\u003c\/li\u003e\n\u003cli\u003eValve Stem Diameter: 5mm\u003c\/li\u003e\n\u003cli\u003eValve Stem Length: 64mm\u003c\/li\u003e\n\u003cli\u003eIntake Threads: 6mm\u003c\/li\u003e\n\u003cli\u003eExhaust Threads: 6mm\u003c\/li\u003e\n\u003cli\u003eHead Height w\/ Intake Valves: 66.1–67.3mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Most stock 139QMB heads use 69mm valves and a 69mm rocker arm. This head uses 64mm valves and requires a 64mm rocker arm. Verify your stock valve stem height before ordering.\u003c\/p\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eFits 139QMB-based 50cc \/ 80cc engines with the following engine codes:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth\u003eEngine Codes\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003e139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD, Other QMA\/QMB models\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eIf your engine code includes \"QM\" or \"FM\" and your valve height and rocker arm are 64mm, this head is compatible. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePerformance upgrades are considered racing parts and are not covered under warranty.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis product is intended for off-road use only. 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","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964556607809,"sku":"1100-1239","price":168.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6803-0-1100-1239_1ec7c4bb-e27f-496a-b8f3-7cd1c594c333.jpg?v=1792557841"},{"product_id":"cylinder-kit-88cc-cast-52mm-qmb139-gy6-150cc-50-ncy-brand","title":"NCY 88cc Big Bore Kit (52mm) - 139QMB \/ GY6 50","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003ch2\u003eNCY 52mm 88cc Big Bore Kit - Extreme Power for QMB139 Engines\u003c\/h2\u003e\u003cp\u003eTurn your 49cc\/50cc scooter into a high-performance machine with the \u003cstrong\u003eNCY 88cc Big Bore Kit\u003c\/strong\u003e. This 52mm cast iron cylinder is designed for riders who demand the maximum displacement possible from the 139QMB platform. Engineered for durability and high-heat tolerance, this kit provides a massive boost in torque and top-end speed.\u003c\/p\u003e\u003ch3\u003ePerformance Highlights\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Displacement:\u003c\/strong\u003e Increases your engine to a true 88cc for superior hill climbing and acceleration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCast Iron Durability:\u003c\/strong\u003e Provides excellent longevity and reliability for daily commuting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Honing:\u003c\/strong\u003e Optimized cylinder walls for reduced friction and improved ring seating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Grade:\u003c\/strong\u003e The preferred choice for \"screamer\" builds across the scooter racing community.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDetailed Model Fitment\u003c\/h3\u003e\u003cp\u003eThis kit fits nearly all \u003cstrong\u003e4-stroke 50cc (QMB139 \/ GY6 50)\u003c\/strong\u003e scooter engines. Below are the most popular compatible models:\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eCompatible Models\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKymco\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAgility 50, Like 50, Super 8 50, People 50 (4T)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTaoTao\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eATM50-A1, Pony 50, Thunder, VIP Future Champion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLance \/ SYM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCali Classic 50, Havana 50, PCH 50, SYM Fiddle II 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIce Bear \/ Wolf\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMaddog 50 (Gen I-V), Wolf RX-50, Wolf Lucky, Islander\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cblockquote\u003e\n\u003cstrong\u003eCRITICAL INSTALLATION NOTE:\u003c\/strong\u003e This is a 52mm kit. Most 139QMB engine cases \u003cstrong\u003erequire machining or cutting\u003c\/strong\u003e to fit the larger cylinder skirt. The supplier recommends using the \u003cstrong\u003eNCY Engine Bore Tool\u003c\/strong\u003e \u003cspan\u003eOrder part number \u003c\/span\u003e1400-1001 if you do not have access to a machine shop.\u003c\/blockquote\u003e\u003ch3\u003eRecommended Support Mods\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBig Valve Head:\u003c\/strong\u003e Use with the NCY 50mm Big Valve Head for optimal flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrankcase Pressure:\u003c\/strong\u003e Install an \u003cstrong\u003eNCY Decompression Tube\u003c\/strong\u003e to manage increased engine pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJetting:\u003c\/strong\u003e Carburetor re-jetting is required (Typically #85-#95 Main Jet depending on altitude).\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003e*Not legal for use in California on pollution-controlled vehicles. For off-road\/track use only.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003eNCY GY6 50\/139QMB 52mm Cast Iron Cylinder Kit w\/o head\u003c\/p\u003e\u003ch3\u003eThis product is not intended for use on public roads or land.\u003c\/h3\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eAgility 50, Like 50, Super 8 50, People 50 (4T). ATM50-A1, Pony 50, Thunder, VIP Future Champion. Cali Classic 50, Havana 50, PCH 50, SYM Fiddle II 50. Maddog 50 (Gen I-V), Wolf RX-50, Wolf Lucky, Islander.\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=72\"\u003eGO MAX CYLINDER CRANKSHAFT\u003c\/a\u003e \u003cspan\u003eCallout 13\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964557623617,"sku":"1100-1248","price":159.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6807-0-1100-1248_a695e1d5-c1fb-4bf5-b035-f866f44a954b.jpg?v=1792557842"},{"product_id":"cvt-pulley-gy6-49cc-qmb139-ncy-brand","title":"NCY Pulley; 139QMB","description":"\u003ch2\u003eDescription\u003c\/h2\u003eVery nice quality pulley by NCY for the GY6 50 engine.\n\u003cp\u003e\nLooking to upgrade the entire transmission? Check out the Non-Performance Transmission Upgrade Kit\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=266\"\u003eGO MAX TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 8\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964558377281,"sku":"1200-1049","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6949-0-1200-1049_2d1c65f1-6ef9-4e5d-a86b-3fbdf7da5803.jpg?v=1792557843"},{"product_id":"cam-performance-gy6-50-cc-qmb139-ncy-brand","title":"NCY Performance Camshaft 139QMB GY6 50cc","description":"\u003cp\u003eUnlock the hidden power potential of your 4-stroke scooter with the \u003cstrong\u003eNCY Performance Camshaft\u003c\/strong\u003e (1100-1250). Designed specifically for the GY6 139QMB engine platform, this high-lift cam profile increases valve duration and lift, allowing your engine to breathe deeper and rev higher. This is the essential upgrade whenever you install a 72cc, 82cc, or 100cc big-bore cylinder kit to ensure your engine can fully utilize the increased displacement.\u003c\/p\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\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Lobe Geometry:\u003c\/strong\u003e Increased lift and duration profiles significantly improve volumetric efficiency compared to stock cams.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision-Machined Sprocket:\u003c\/strong\u003e Includes a factory-indexed 34-tooth timing sprocket for precise valve-to-piston synchronization.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened Steel Core:\u003c\/strong\u003e Wear-resistant steel withstands sustained high-RPM heat and stress of modified performance builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Fitment:\u003c\/strong\u003e Drop-in installation into stock 139QMB cylinder heads — no machining required.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Lobe:\u003c\/strong\u003e 25.8mm × 21mm × 10.3mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Lobe:\u003c\/strong\u003e 25.5mm × 21mm × 10.2mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSprocket Teeth:\u003c\/strong\u003e 34\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearings:\u003c\/strong\u003e 2 × TPI #16002C3 (18×32×8mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 1100-1250\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eInstallation Note:\u003c\/strong\u003e When installing a high-performance camshaft with a big-bore kit, verify valve-to-piston clearance by rotating the crankshaft by hand before startup. Set valve lash to performance spec (typically 0.003–0.004\" intake\/exhaust on modified engines) upon installation.\u003c\/p\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eDirect fit for 139QMB-based 50cc, 72cc, 82cc, and 100cc 4-stroke engines with the following factory engine codes:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eEngine Series Code\u003c\/th\u003e\n\u003cth\u003eCompatible Variants\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommon Codes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ139QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964558672193,"sku":"1100-1250","price":72.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6808-0-1100-1250_1d7d662d-80fe-4749-b173-b03d5c034eb9.jpg?v=1792557843"},{"product_id":"cvt-pulley-golden-gy6-49cc-qmb139-ncy-brand","title":"NCY Golden Performance Variator Pulley - 139QMB Genuine 50cc","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eNCY PTFE-coated variator pulley\u003c\/strong\u003e helps your scooter's CVT transition smoothly and quickly as you accelerate, adding lightweight aluminum-alloy construction and a distinctive gold low-friction finish to your transmission. The coated roller tracks help keep debris from building up and reduce roller wear, making this pulley a useful starting point for tuning a compatible 139QMB or Genuine 50cc setup.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold PTFE-coated roller tracks:\u003c\/strong\u003e Promote smooth weight movement and help reduce debris accumulation, flat-spot wear, and improve acceleration due to lower friction than stock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight aluminum alloy:\u003c\/strong\u003e Housing is lighter than stock, improving acceleration due to lower rotating mass.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e89mm pulley diameter:\u003c\/strong\u003e For matching small-scooter variator configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16x13 tuning options:\u003c\/strong\u003e Uses compatible 16x13mm roller weights or sliding weights, sold separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndividual pulley:\u003c\/strong\u003e Variator guide slides and roller\/sliding weights are not included.\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 1200-1050\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 615A01DIOYE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Variator pulley \/ movable pulley housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Gold PTFE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner diameter:\u003c\/strong\u003e 20 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter diameter:\u003c\/strong\u003e 89 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 32.4 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 5.29 oz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight size:\u003c\/strong\u003e 16x13 mm, sold separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuide slides:\u003c\/strong\u003e Sold separately\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\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eFitment details\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e139QMB\/QMB139 (GY50) 50cc four-stroke and compatible 80cc builds\u003c\/td\u003e\n\u003ctd\u003eMatch the 20mm bore and 89mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelated engine configurations\u003c\/td\u003e\n\u003ctd\u003e139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB and 147QMD; matching variator dimensions required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGenuine\u003c\/td\u003e\n\u003ctd\u003eBuddy 50 and RoughHouse 50 with compatible variator configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther existing applications\u003c\/td\u003e\n\u003ctd\u003eCompatible ZNEN, Trailmaster, Tao Tao and other Chinese-make scooter configurations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eCheck the original pulley dimensions, variator components, and weight size before ordering. An engine code containing “QM” or “FM” alone does not establish compatibility. Select weight mass to suit your engine and CVT setup.\u003c\/p\u003e\u003ch3\u003eRecommended Components\u003c\/h3\u003e\u003cp\u003eVariator guide slides are sold separately. See \u003ca href=\"\/products\/dr-pulley-16x13-variator-slide-set-139qmb-dio-ruckus?variant=67964722381121\" title=\"Dr. Pulley variator guide slide set 1200-1261\"\u003eDr. Pulley guide slide set 1200-1261\u003c\/a\u003e and verify compatibility with your ramp plate.\u003c\/p\u003e\u003cp\u003eRoller weights or sliding weights are also sold separately. Browse 16x13mm variator weights to complete your setup. This product is not a complete variator kit.\u003c\/p\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\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 8\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964559229249,"sku":"1200-1050","price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6950-0-1200-1050_adb7b766-5121-43ba-b7d4-93f5ae5e9ea5.jpg?v=1792557844"},{"product_id":"clutch-bell-housing-qmb139-49cc-ncy-brand","title":"NCY 107mm Performance Clutch Bell - 139QMB \/ Buddy 50","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eNCY performance clutch bell\u003c\/strong\u003e brings quicker acceleration, better initial bite and more efficient cooling to compatible 139QMB scooters, Genuine Buddy 50 and CSC applications. A lightweight bell helps your drivetrain respond more eagerly, while the textured engagement surface and ventilated design make this a rewarding upgrade for stock scooters and drag builds alike.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuicker acceleration:\u003c\/strong\u003e Lightweight construction reduces rotating mass for a more responsive feel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBetter initial bite:\u003c\/strong\u003e Textured engagement surface helps the clutch grab as you get moving.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficient cooling:\u003c\/strong\u003e Large face openings encourage airflow through the clutch area.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat and debris management:\u003c\/strong\u003e Cross-drilled openings disperse heat and let debris escape.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance versatility:\u003c\/strong\u003e Upgrade the clutch housing on a stock setup or a tuned drag build.\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 1200-1054\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBell dimensions:\u003c\/strong\u003e ID 107mm; OD 114.85mm; height 34.54mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSplines:\u003c\/strong\u003e 22\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline hub dimensions:\u003c\/strong\u003e ID 11–12mm; OD 16.95mm; height 17.75mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClutch nut \/ socket:\u003c\/strong\u003e M28 \/ 39mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClutch size:\u003c\/strong\u003e 105mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft slider:\u003c\/strong\u003e 33.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePins:\u003c\/strong\u003e 6mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNut \/ washer:\u003c\/strong\u003e M10 \/ M10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing seat:\u003c\/strong\u003e 47.4mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSocket:\u003c\/strong\u003e 14mm\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\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake \/ platform\u003c\/th\u003e\n\u003cth\u003eModels \/ engine codes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGenuine\u003c\/td\u003e\n\u003ctd\u003eBuddy 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChicago Scooter Company\u003c\/td\u003e\n\u003ctd\u003ego, go MAX, Bella Classic 50, Nitro Sport 50, Pug 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e139QMB-based 50cc \/ 80cc engines\u003c\/td\u003e\n\u003ctd\u003e139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD and other QMA\/QMB models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eThis product is intended for off-road use only. This product is not intended for use on public roads or land. This product is not legal for use in California on pollution-controlled vehicles. Check local laws before installing.\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=266\"\u003eGO MAX TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 2\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964559982913,"sku":"1200-1054","price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6952-0-1200-1054_540a915f-edfb-4fdf-beaf-b27d47a550f1.jpg?v=1792557845"},{"product_id":"clutch-139qmb-49cc-high-performance-ncy-brand","title":"NCY Racing Clutch - Performance GY6 50cc QMA\/ 139QMB Engines","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003ch3\u003e\u003cstrong\u003eNCY Performance Racing Clutch for GY6 50cc \/ 139QMB\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eUpgrade your takeoff and mid-range acceleration with the \u003cstrong\u003eNCY Racing Clutch\u003c\/strong\u003e. Specifically engineered for \u003cstrong\u003e50cc 139QMB engines\u003c\/strong\u003e, this premium clutch features lightweight gray clutch shoes and stiff 2000 RPM red springs. By allowing the engine to reach a higher power band before engagement, you’ll experience a snappier throttle response and eliminate \"bogging\" during initial acceleration.\u003c\/p\u003e\u003cp\u003eManufactured in Taiwan to ISO 9001 standards, NCY is the trusted leader in aftermarket CVT performance, offering superior durability and heat resistance compared to stock OEM components.\u003c\/p\u003e\u003ch4\u003e\u003cstrong\u003ePerformance Specifications:\u003c\/strong\u003e\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClutch ID:\u003c\/strong\u003e 24.3mm \u0026lt; 28mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter (OD):\u003c\/strong\u003e 105mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngagement:\u003c\/strong\u003e Pre-installed 2000 RPM Red Clutch Springs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Optimized lightweight gray clutch shoes for faster rotation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003e\u003cstrong\u003eCompatibility \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/h4\u003e\u003cp\u003eFits most \u003cstrong\u003e139QMB-based 50cc \/ 80cc Chinese Honda Clone 4-stroke engines and Genuine 2-Stroke models\u003c\/strong\u003e. If your engine code contains \"QM\" or \"FM\", this product is a direct-fit performance upgrade.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Scooters:\u003c\/strong\u003e Buddy 50, RoughHouse 50, Black Cat, Rattler 50\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChicago Scooter Company:\u003c\/strong\u003e go., go. MAX, Bella, Pug, Nitro\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSYM \/ Lance:\u003c\/strong\u003e Fiddle 50, Mio 50, Symply 50, Cali Classic, PCH 50\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChinese GY6 50cc:\u003c\/strong\u003e TaoTao, Wolf, Ice Bear, Bintelli, Kymco, and more.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\n\u003ch4\u003e\u003cstrong\u003e?? Critical Installation Note for Honda Owners:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eIf installing on a \u003cstrong\u003eHonda Ruckus (GET)\u003c\/strong\u003e or \u003cstrong\u003eHonda Metropolitan (GET 2012+)\u003c\/strong\u003e, you \u003cstrong\u003eMUST\u003c\/strong\u003e upgrade to the NCY secondary sliding sheave\/pulley shaft (SKU: 1200-1268). This racing clutch is not compatible with the stock Honda pulley shaft.\u003c\/p\u003e\n\u003c\/div\u003e\u003cp\u003e\u003cem\u003ePair this clutch with an NCY Performance Bell and Variator for the ultimate CVT transmission overhaul.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e  Ensure model fitment before purchase.\u003c\/p\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eBrands: Amstar, Amigo, Ascend, Baotian, Bashan, Blade, Boom, Chicago Scooter Company, Dongfang, Roketa, Baotian, Bashan, BMS, Cool Sports, E Ton, Fly Wing, Eagle, Fly, Italica, Riya, Ice Bear, Jackel, Jet Moto, JCL, Taotao, Peace, JM Star, Jonway, Kazuma, Keeway, KMD, Kymco, Lance, Lifan, Linhai, Loncin, Longbo, Fuxin, Jiajue, Tao Tao, Tao Motors, Trailmaster, Maxtrade, Meitien, Motofino, Motorino, NST, Panterra, Panther, Qlink, Yiben, Red Streak, Redcat, Roketa, Schwinn, Strada, SYM, Tank, Terminator ,Tomberlin, TNG, United Motors, Vento, Vitacci, Wildfire, Wolf, X-Treme, X-Pro, Yongfu, ZNEN, Zhongneng , Zhilong, Geely, Wangye, ZH and more Manufactured by: Taizhou Zhongneng Motorcycle Co.; Jiangsu Zhongneng Motorcycle Co.; Jiangsu Meijunte Technology Co.; Taizhou Qianxin Vehicle Co.; Ningbo Dongfang Lingyun Vehicle Made Co.; Taizhou Zhilong Technology Co.; Zhejiang Jiajue Motorcycle Manufacturing Co.; Zhejiang Gelly Ming Industrial Co.; Taizhou City Senglong Motorcycle Manufacture Co.; Jiangsu Sacin Motorcycle Co.; Jiangsu Linhai Power Machinery Group Co.; Zheijiang TaoTao Vehicles Co.; Zhejiang Senling Motorcycle Co.; Sanmen County Yongfu Machine Co; Taizhou Jiaojiang Zhiwei Motorcycle Manufacture Co.; Huzhou Daixi Zhenhua Technology Trade Co.; Taizhou Zhongneng Motorcycle Co.; Zhejiang Riya Motorcycle Co.; Ningbo Longjia Motorcycle Co.; Taizhou Zhongneng Motorcycle Co.; 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=266\"\u003eGO MAX TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 3\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964560736577,"sku":"1200-1055","price":64.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/FA524386-74B6-4E67-9974-4C707F42405C_00cbe4f7-ec50-4473-bf76-a4e617e89fde.jpg?v=1792993055"},{"product_id":"cvt-pressure-plate-gy6-49cc-qmb139-ncy-brand","title":"NCY CVT Ramp Plate - 139QMB, Buddy 50, Roughhouse 50","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eNCY CVT ramp plate (pressure plate) with sliders included for GY6 50cc (139QMB\/GY50) engines, Genuine Buddy 50, and Genuine RoughHouse 50 scooters. A direct replacement for the stock variator ramp plate. Made in Taiwan by NCY.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRamp plate with sliders included\u003c\/li\u003e\n\u003cli\u003eDirect replacement for 139QMB \/ GY50 variator assemblies\u003c\/li\u003e\n\u003cli\u003eFits Genuine Buddy 50 and RoughHouse 50\u003c\/li\u003e\n\u003cli\u003eMade in Taiwan by NCY\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIncludes: Ramp plate and sliders\u003c\/li\u003e\n\u003cli\u003eApplication: 139QMB \/ GY50 50cc CVT variator\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGenuine\u003c\/td\u003e\n\u003ctd\u003eBuddy 50\u003c\/td\u003e\n\u003ctd\u003e139QMB \/ GY50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGenuine\u003c\/td\u003e\n\u003ctd\u003eRoughHouse 50\u003c\/td\u003e\n\u003ctd\u003e139QMB \/ GY50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003eGY6 50cc scooters\u003c\/td\u003e\n\u003ctd\u003e139QMB \/ GY50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eLooking to upgrade the entire transmission? Check out the Non-Performance Transmission Upgrade Kit for 139QMB.\u003c\/p\u003e\u003cp\u003eThis product is intended for off-road and racing use only. Not intended for use on public roads.\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=266\"\u003eGO MAX TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 7\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964561686849,"sku":"1200-1056","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6954-0-1200-1056_dd688ddd-7fe2-49f0-a5b3-e537f20f6629.jpg?v=1792557847"},{"product_id":"cvt-drive-face-assembly-aluminum-gy6-49cc-qmb139-ncy-brand","title":"NCY, Drive Face Assembly (Aluminum); 139QMB","description":"Light weight aluminum drive face assembly by NCY. \n\n\n\nFitment:\n\nGY6 50cc engines also known as QMB\n\nEngines with the following codes:\n\n139QMA , 139QMB , 1P39QMB , 1P39QMA , 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, LJ139QMB as well as 147QMD (GY6 80cc) \n\nand others\n\n\u003cp\u003e\n\nLooking to upgrade the entire transmission? Check out the Non-Performance Transmission Upgrade Kit\n\nAbout NCY:  NCY stands as the premier provider of aftermarket performance components for leading scooter brands such as Honda, Yamaha, Genuine, Vespa, Piaggio, SYM, Lance, KYMCO, and GY6\/QMB powered scooters. Established in 1997, NCY adheres to rigorous quality standards and holds ISO 9001 certification.  \n\nNCY performance parts are made in Taiwan.\u003c\/p\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964564439361,"sku":"1200-1161","price":60.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/1200-1161_3efa7c74-3a36-474b-9944-63e22013717c.webp?v=1792993055"},{"product_id":"carburetor-float-bowl-gasket-139qmb-49cc-ncy-brand","title":"NCY Float Bowl Gasket for CVK Carburetors - GY6 125\/150cc","description":"\u003cp\u003eStop fuel leaks at the source with this \u003cstrong\u003eNCY float bowl gasket\u003c\/strong\u003e for Keihin-style CVK carburetors on GY6 125cc and 150cc engines. This molded rubber gasket seals the float bowl to the carburetor body and includes three integrated O-ring loops — one at the top-left mounting boss, one at the bottom-center drain port, and one at the right-side drain screw port — for a complete, leak-free seal in a single piece. Replace any time you remove the float bowl for cleaning or jetting, or when the existing gasket is compressed, cracked, or leaking fuel.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMolded Rubber Construction:\u003c\/strong\u003e Single-piece gasket with three integrated O-ring loops for bowl, drain, and side-port sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrect CVK Profile:\u003c\/strong\u003e Designed for Keihin-style CV carburetors used on GY6 125cc and 150cc engines (152QMI \/ 157QMJ).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel-Resistant Material:\u003c\/strong\u003e Seals the float bowl against fuel seepage at all contact points.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Replacement:\u003c\/strong\u003e Fits a wide range of Chinese 125\/150cc scooters using CVK-style carburetors.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSold Individually.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 1300-1002\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Molded rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Float bowl gasket for Keihin-style CVK carburetor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e GY6 125cc (152QMI) \/ GY6 150cc (157QMJ)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Approx. 4.5\" L x 3.5\" W\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eFits GY6 125cc and 150cc engines with a Keihin-style CVK carburetor. Compatible with a wide range of Chinese-manufactured 125cc and 150cc scooters from brands including Genuine, SYM, Wolf, Bintelli, Tao Tao, and many others using the GY6 platform.\u003c\/p\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964564635969,"sku":"1300-1002","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-7101-0-1300-1002_223ceb2d-7ab2-49cf-a2c1-b47411fac590.jpg?v=1792557850"},{"product_id":"carburetor-idle-screw-49cc-qmb139-gy6-125-150cc-ncy-brand","title":"NCY Idle Screw for CVK Carburetors; GY6, 139QMB","description":"\u003ch2\u003eTool-Free Tuning: NCY Performance Idle Adjustment Screw\u003c\/h2\u003e\u003cp\u003eStop fumbling for a screwdriver every time the weather changes. The \u003cstrong\u003eNCY Idle Adjustment Screw\u003c\/strong\u003e replaces the difficult-to-reach stock screw on your CVK carburetor\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperior Vibration Resistance:\u003c\/strong\u003e\u003cspan\u003e Includes a high-tension spring designed to hold your settings securely, even on high-vibration GY6 engines.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Brass Construction:\u003c\/strong\u003e Precision-machined for smooth threading and long-term resistance to fuel and heat corrosion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal CVK Fitment:\u003c\/strong\u003e Designed specifically for the constant-velocity (CVK) style carburetors found on most modern 4-stroke scooters.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e CVK \/ GY6 Style Carburetors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Machined Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Included:\u003c\/strong\u003e Yes (High-Tension Steel)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Direct replacement for OEM idle screw.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eConfirmed Vehicle Fitment\u003c\/h3\u003e\u003cp\u003eThis idle screw fits 50cc to 170cc 4-stroke engines utilizing a CVK carburetor:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eEngine Type\u003c\/th\u003e\n\u003cth\u003ePopular Models\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGY6 125cc \/ 150cc\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGenuine Buddy 125\/150 Wolf EX-150, TaoTao Lancer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e139QMB \/ QMB139\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTaoTao Powermax, Wolf Blaze II, Etc.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cblockquote\u003e\n\u003cstrong\u003eMechanic's Note:\u003c\/strong\u003e When installing, ensure the engine is warm. Screw the new NCY idle screw in until the engine stays running at a steady RPM (typically 1,600–1,900 RPM for GY6). If your bike \"dies\" at stoplights, this is the quickest fix to keep your engine alive.\u003c\/blockquote\u003e\u003chr\u003e\u003cp\u003e\u003cem\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e 1300-1003 | \u003cstrong\u003eManufacturer:\u003c\/strong\u003e NCY | \u003cstrong\u003ePart Number:\u003c\/strong\u003e 619N14CVK\u003c\/em\u003e\u003c\/p\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964565684545,"sku":"1300-1003","price":14.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-7102-0-1300-1003_1ba11242-2ace-45cc-87ee-13aca570b998.jpg?v=1792557851"},{"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":"brake-shoes-blue-qmb139-minarelli-ncy-brand","title":"NCY Blue Series Performance Grooved Brake Shoes | 110mm Drum","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eUpgrade your 110mm drum brake stopping power with \u003cstrong\u003eNCY Blue Series High-Performance Grooved Brake Shoes\u003c\/strong\u003e. Built on high-pressure die-cast aluminum platforms with bonded brake linings, these shoes are radius-ground, edge-trimmed, and feature lead-in\/lead-out chamfers at the lining ends. The multiple-angled liner grooves channel dirt, dust, water, and debris away from the braking area to improve braking performance and extend shoe and drum life.\u003c\/p\u003e\u003cp\u003eMade in Taiwan by NCY (ISO 9001 certified since 1997).\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHigh-pressure die-cast aluminum platform with bonded brake lining\u003c\/li\u003e\n\u003cli\u003eRadius ground and edge trimmed for precise fit\u003c\/li\u003e\n\u003cli\u003eLead-in\/lead-out chamfers at lining ends for smooth engagement\u003c\/li\u003e\n\u003cli\u003eMultiple angled liner grooves channel dirt, dust, and water away from braking surface\u003c\/li\u003e\n\u003cli\u003eOE-style brake shoe springs included\u003c\/li\u003e\n\u003cli\u003eMade in Taiwan by NCY (ISO 9001 certified since 1997)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment: \u003c\/strong\u003eFits 110mm diameter brake drums \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake Shoes (qty 2):\u003c\/strong\u003e 104mm L × 52.82mm W × 25.2mm H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClutch Springs (qty 2):\u003c\/strong\u003e 55mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e High-pressure die-cast aluminum platform, bonded lining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrooves:\u003c\/strong\u003e Multiple angled liner grooves for debris channeling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eFits \u003cstrong\u003e50cc 139QMB\u003c\/strong\u003e and \u003cstrong\u003eMinarelli\/Morini 2T\u003c\/strong\u003e drum brake rear wheels, including:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModels\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChicago Scooter Co.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBella Classic 50, Nitro Sport 50, Pug 50, go., go MAX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYamaha \/ Minarelli\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eZuma 50 (2T), Vino 50 (2T \u0026amp; 4T), BWS 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHonda\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eElite 80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSYM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFiddle 50, Symba\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKymco\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAgility 50, Like 50, Sento 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGenuine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBuddy 50, RoughHouse 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e139QMB-based scooters with 110mm brake drum diameters:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e139QMA\u003c\/th\u003e\n\u003cth\u003e139QMB\u003c\/th\u003e\n\u003cth\u003e1P39QMB\u003c\/th\u003e\n\u003cth\u003e1P39QMA-2\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\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\u003c\/td\u003e\n\u003ctd\u003eOther QMB\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\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=150\"\u003eGO MAX REAR WHEEL ASSY\u003c\/a\u003e \u003cspan\u003eCallout 3\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964571713857,"sku":"1000-1126","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6705-0-1000-1126_60483103-3e58-4c34-bc28-6dc8b5f0c662.jpg?v=1792557858"},{"product_id":"air-filter-38mm-45-degree-angle-shielded-gray","title":"RDLN Racing 38mm High Flow Air Filter - 50-80cc Performance","description":"\u003cp\u003eBoost horsepower, sharpen throttle response, and deliver an aggressive intake growl to your small-displacement powerplant with the \u003cstrong\u003eRDLN 38mm 45-Degree Racing Air Filter Assembly\u003c\/strong\u003e. Engineered as a high-flow performance upgrade for carbureted 50cc 2-stroke and 4-stroke scooters, this open-element intake replaces your restrictive factory plastic air box with a high-CFM pleated filtration element. Includes a removable smoke-tinted rain cover cap with mounting screw.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e45-Degree Elbow:\u003c\/strong\u003e Angled rubber mounting neck provides clearance around tight rear shock mounts and frame gussets on small scooter chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable Rain Cover:\u003c\/strong\u003e Smoke-tinted plastic cap prevents moisture and road spray from entering the intake during wet-weather riding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Flow Pleated Mesh Element:\u003c\/strong\u003e Conical pleated filtration element with chrome end cap maximizes surface area while reducing intake restriction vs. stock foam or paper filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorm-Gear Clamp:\u003c\/strong\u003e Reinforced rubber mounting collar with adjustable worm-gear hose clamp for an airtight, vibration-proof seal on the carburetor inlet.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment Guide\u003c\/h3\u003e\u003cp\u003eFeatures a \u003cstrong\u003e38mm internal diameter mounting collar with an adjustable clamp\u003c\/strong\u003e that will expand or contract to fit 36mm–40mm carburetor intake bells. Built for the following 50cc carbureted scooters:\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e50cc 4-Stroke (4T) — GY6 \/ 139QMB Platform\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHonda Ruckus 50 (NPS50), Honda Metropolitan 50 (CHF50, carbureted years)\u003c\/li\u003e\n\u003cli\u003eKYMCO Agility 50, KYMCO Super 8 50 4T, SYM Mio 50\u003c\/li\u003e\n\u003cli\u003eTaoTao (ATM50-A1, Pony), Wolf Brand (RX-50, Islander), IceBear, Bintelli, Chicago Scooter Company (Go.), Lance, Peace Sports, Roketa, Jonway, Vitacci, X-Pro\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003e50cc 2-Stroke (2T) — Minarelli \/ Dio \/ Sport Platforms\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGenuine Buddy 50, Genuine RoughHouse 50, E-Ton Beamer 50 \/ Beamer II \/ Matrix 50, Keeway Hurricane 50 \/ Matrix 50\u003c\/li\u003e\n\u003cli\u003eHonda Elite 50 (SR\/S models 1994–2001), Kymco ZX 50, SYM DD50\u003c\/li\u003e\n\u003cli\u003eYamaha Zuma 50 (pre-2012), Yamaha Vino 50 (2-stroke)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eNote for GY6 125cc \/ 150cc owners:\u003c\/strong\u003e This 38mm intake generally will NOT fit stock 125cc or 150cc carburetors, which require a larger 42mm–43mm intake boot. Measure your carburetor throat outer diameter before ordering.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIntake Boot Inner Diameter: 38mm (fits 36mm–40mm carburetor velocity stacks)\u003c\/li\u003e\n\u003cli\u003eElbow Angle: 45 degrees\u003c\/li\u003e\n\u003cli\u003eFilter Dimensions: 5.0\" L x 4.0\" W x 4.0\" H\u003c\/li\u003e\n\u003cli\u003eFilter Element: Pleated synthetic mesh with stainless support and chrome end cap\u003c\/li\u003e\n\u003cli\u003eIncludes: Filter assembly, smoke-tinted rain cover cap, mounting screw, worm-gear clamp\u003c\/li\u003e\n\u003cli\u003eSKU: 1300-1112\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003e\u003cstrong\u003eImportant — Re-Jetting Required:\u003c\/strong\u003e Switching from a stock airbox to an open high-flow filter significantly increases airflow. This will cause your engine to run lean. You must up-jet your carburetor's main jet — typically 5–10 sizes depending on elevation — to properly balance the fuel mixture after installation.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003e\u003cem\u003ePerformance upgrades are considered racing parts and are not covered under warranty. For off-road and closed-course competition use only. Not legal for use in California on pollution-controlled vehicles.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eConditional intake conversion fitment: Honda Ruckus NPS50, Metropolitan CHF50 2002–2009; Kymco Agility 50, Super 8 50 4T, ZX 50; SYM Mio 50, DD50; TaoTao ATM50-A1\/Pony; Wolf RX-50\/Islander; compatible IceBear, Bintelli, CSC Go, Lance, Peace Sports, Roketa, Jonway, Vitacci, X-Pro; Genuine Buddy 50\/RoughHouse 50; E-Ton Beamer 50\/Beamer II\/Matrix 50; Keeway Hurricane 50\/Matrix 50; Honda Elite 50 SR\/S 1994–2001; Yamaha Zuma 50 2T pre-2012 and Vino 50 2T; verify 36–40 mm carb air-inlet OD, elbow orientation and clearance; not for stock GY6 125\/150cc carbs needing 42–43 mm connections\u003c\/p\u003e","brand":"RDLN","offers":[{"title":"Default Title","offer_id":67964572172609,"sku":"1300-1112","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-7161-0-1300-1112_508f6e12-3c26-458d-9f32-ab87906fd156.jpg?v=1792557859"},{"product_id":"cvt-sliders-set-of-3-gy50-qmb139","title":"NCY Variator Slide Pieces Set of 3 - 139QMB 50cc 4T Scooters","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eNCY variator slide pieces (set of 3) for 50cc 4-stroke scooters with 139QMB-based engines — black plastic C\/U-shaped sliders with notched engagement slots that replace the stock ramp plate slide pieces in the front variator pulley assembly. Sold as a set of 3. SKU: 1200-1186 | MPN: 675A17DIORLL.\u003c\/p\u003e\u003cp\u003eVariator slides are the guides between the variator pulley and the back plate. These are commonly overlooked during service but wear gradually and can cause excess noise and a loss of CVT performance and acceleration. Inspect and replace whenever servicing roller or slider weights.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eNCY replacement variator slide pieces — black plastic C\/U-shaped sliders with notched engagement slots\u003c\/li\u003e\n\u003cli\u003eSold as a set of 3 — replaces stock ramp plate slide pieces in front variator assembly\u003c\/li\u003e\n\u003cli\u003eFits 139QMB-based 50cc and 80cc 4-stroke engines (139QMA, 1P39QMB, YN139QMB, JJ1P39QMB, 147QMD, and all QM\/FM variants)\u003c\/li\u003e\n\u003cli\u003eMade in Taiwan by NCY | ISO 9001 certified\u003c\/li\u003e\n\u003cli\u003eSKU: 1200-1186 | MPN: 675A17DIORLL\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrand: NCY\u003c\/li\u003e\n\u003cli\u003eSKU: 1200-1186 | MPN: 675A17DIORLL\u003c\/li\u003e\n\u003cli\u003eQuantity: Set of 3\u003c\/li\u003e\n\u003cli\u003eMaterial: Black plastic\u003c\/li\u003e\n\u003cli\u003eFitment: 139QMB-based 50cc\/80cc 4-stroke engines\u003c\/li\u003e\n\u003cli\u003eMade in Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatible Engine Codes:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"4\"\u003e139QMB-based 50cc \/ 80cc 4-stroke engines\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 \u003c\/p\u003e\u003cp\u003eDon't see your engine listed? If the 50cc engine code includes \"QM\" or \"FM\", this product is likely compatible with your vehicle.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eBrands: Amstar, Amigo, Ascend, Baotian, Bashan, Blade, Boom, Chicago Scooter Company, Dongfang, Roketa, Baotian, Bashan, BMS, Cool Sports, E Ton, Fly Wing, Eagle, Fly, Italica, Riya, Ice Bear, Jackel, Jet Moto, JCL, Taotao, Peace, JM Star, Jonway, Kazuma, Keeway, KMD, Kymco, Lance, Lifan, Linhai, Loncin, Longbo, Fuxin, Jiajue, Tao Tao, Tao Motors, Trailmaster, Maxtrade, Meitien, Motofino, Motorino, NST, Panterra, Panther, Qlink, Yiben, Red Streak, Redcat, Roketa, Schwinn, Strada, SYM, Tank, Terminator ,Tomberlin, TNG, United Motors, Vento, Vitacci, Wildfire, Wolf, X-Treme, X-Pro, Yongfu, ZNEN, Zhongneng , Zhilong, Geely, Wangye, ZH and more Manufactured by: Taizhou Zhongneng Motorcycle Co.; Jiangsu Zhongneng Motorcycle Co.; Jiangsu Meijunte Technology Co.; Taizhou Qianxin Vehicle Co.; Ningbo Dongfang Lingyun Vehicle Made Co.; Taizhou Zhilong Technology Co.; Zhejiang Jiajue Motorcycle Manufacturing Co.; Zhejiang Gelly Ming Industrial Co.; Taizhou City Senglong Motorcycle Manufacture Co.; Jiangsu Sacin Motorcycle Co.; Jiangsu Linhai Power Machinery Group Co.; Zheijiang TaoTao Vehicles Co.; Zhejiang Senling Motorcycle Co.; Sanmen County Yongfu Machine Co; Taizhou Jiaojiang Zhiwei Motorcycle Manufacture Co.; Huzhou Daixi Zhenhua Technology Trade Co.; Taizhou Zhongneng Motorcycle Co.; Zhejiang Riya Motorcycle Co.; Ningbo Longjia Motorcycle Co.; Taizhou Zhongneng Motorcycle Co.; 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=266\"\u003eGO MAX TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 9\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964575547713,"sku":"1200-1186","price":4.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/1200-1186_39ad5e0b-986c-4270-a602-1ed59ade2ee3.jpg?v=1792945468"},{"product_id":"gasket-set-cylinder-50-mm-qmb139-ncy-brand","title":"NCY Cylinder Gaskets (50 mm); 139QMB","description":"Replacement cylinder gaskets for 139QMB with 50mm big bore kit. NCY Gasket kit.  \n\n\u003cp\u003e\n\nFits NCY 50mm BBK #1100-1237\u003c\/p\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964575940929,"sku":"1100-1399","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6881-0-1100-1399_63413dbb-6448-455c-badf-97887dd2c258.jpg?v=1792557863"},{"product_id":"gasket-set-cylinder-47mm-qmb139-ncy-brand","title":"NCY Cylinder Gaskets (Replacement, 47mm); 139QMB","description":"NCY Replacement cylinder gaskets for 139QMB with 47mm big bore kit. NCY Gasket kit.  Quality replacement part\n\n\u003cp\u003e\n\nFits NCY 47mm Big Bore Kit #1100-1247\u003c\/p\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964576727361,"sku":"1100-1406","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6882-0-1100-1406_3108862f-5d95-4782-baf5-a43ff140e67e.jpg?v=1792557864"},{"product_id":"cdi-performance-ac-6-pin-gy6-150cc-qmb139-ncy-brand","title":"NCY Performance AC CDI (No Rev Limiter) - GY6 \u0026 139QMB","description":"\u003cp\u003eUnlock your engine's full potential with the \u003cstrong\u003eNCY Performance CDI\u003c\/strong\u003e. Designed specifically for 139QMB and GY6-based 50cc–170cc scooters, this high-output ignition module replaces your restrictive factory CDI with a more aggressive ignition curve and, most importantly, \u003cstrong\u003eremoves the factory rev limiter\u003c\/strong\u003e — allowing your engine to reach higher RPMs and sustain power through the top of the rev range.\u003c\/p\u003e\u003cp\u003eThe rugged orange billet aluminum casing doubles as a heat sink to protect the internal transformer, which boosts system voltage to \u003cstrong\u003e400–600 volts\u003c\/strong\u003e for a hotter spark and more efficient combustion.\u003c\/p\u003e\u003ch3\u003eKey Performance Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRev Limiter Removed:\u003c\/strong\u003e Eliminates the electronic RPM ceiling found on stock units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive Timing Map:\u003c\/strong\u003e Retuned ignition curve for improved acceleration and throttle response\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Voltage Output:\u003c\/strong\u003e 400–600V transformer boosts spark intensity for reliable ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBillet Aluminum Housing:\u003c\/strong\u003e Protects sensitive electronics from road vibration and heat\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNCY is a Taiwan-based ISO 9001 certified manufacturer specializing in high-performance scooter components. Their CDI units are trusted by enthusiasts and tuners worldwide for consistent quality and measurable performance gains.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eRev Limiter Removed: Eliminates the electronic RPM ceiling found on stock units Aggressive Timing Map: Retuned ignition curve for improved acceleration and throttle response High-Voltage Output: 400–600V transformer boosts spark intensity for reliable ignition Billet Aluminum Housing: Protects sensitive electronics from road vibration and heat\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 0900-1005\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector:\u003c\/strong\u003e 6-Pin (Square 2-pin + 4-pin block)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e AC (Alternating Current)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Output:\u003c\/strong\u003e 400–600V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e NCY - ISO 9001 Certified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.29 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eThis is a \u003cstrong\u003e6-Pin (2+4) AC Ignition\u003c\/strong\u003e module compatible with most Chinese-manufactured GY6 engines:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eEngine Family\u003c\/th\u003e\n\u003cth\u003eCompatible Codes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e50cc \/ 80cc (139QMB)\u003c\/td\u003e\n\u003ctd\u003e139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e125cc \/ 150cc \/ 170cc (157QMJ)\u003c\/td\u003e\n\u003ctd\u003e157QMJ, 161QMK, 152QMI, 1P61QMK, 1P57QMJ, 1P52FMI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cem\u003eDon't see your engine listed? If the engine code includes \"QM\" or \"FM\" and uses an AC-based CDI system, this module is compatible.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes NOT fit:\u003c\/strong\u003e Genuine 50cc scooters (Buddy\/RoughHouse) or vehicles with DC-based ignition systems (e.g., Wolf Jet II).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSafety \u0026amp; Legal:\u003c\/strong\u003e This product is intended for \u003cstrong\u003eoff-road\/racing use only\u003c\/strong\u003e. Not legal for use on public roads. California residents: not legal for use on pollution-controlled vehicles. Performance upgrades are considered racing parts and are not covered under warranty.\u003c\/p\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964579676481,"sku":"0900-1005","price":65.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6639-0-0900-1005_57166d4a-f27e-4502-9505-740d7c790994.jpg?v=1792557869"},{"product_id":"roller-weight-tuning-set-16x13-range-from-3g-to-14g-prima-brand","title":"Prima Roller Weight Tuning Kit - 16x13 - 3g to 14g","description":"\u003ch2\u003ePrima Roller Weight Tuning Kit (16x13) — 3g to 14g (36 Total Weights)\u003c\/h2\u003e\n\n\n\n\u003cp\u003eStop guessing and start tuning. The \u003cstrong\u003ePrima Roller Weight Tuning Kit\u003c\/strong\u003e is the ultimate diagnostic tool for anyone looking to dial in their scooter's CVT performance. Whether you are aiming for explosive low-end wheelie power or trying to find that extra 5 MPH of top-end speed, this kit provides the full spectrum of weights needed to find your engine's \"sweet spot.\" Instead of buying multiple individual sets, this all-in-one master kit allows you to test, swap, and perfect your transmission's behavior in a single afternoon.\u003c\/p\u003e\n\n\n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eMassive Weight Range:\u003c\/strong\u003e Includes 3 weights each of \u003cstrong\u003e3g, 4g, 5g, 7g, 10g, and 14g\u003c\/strong\u003e, allowing for hundreds of potential combinations to achieve your precise target grammage.\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eStandard 16x13mm Fitment:\u003c\/strong\u003e The most common size for 50cc 4-stroke (GY6 \u0026amp; Ruckus) and many 50cc 2-stroke engines.\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Impact Composite:\u003c\/strong\u003e These weights are designed for high-heat resistance and low friction, ensuring smooth shifting during the testing process.\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eOrganized Storage:\u003c\/strong\u003e Comes in a durable, partitioned plastic case to keep your weights sorted and prevent \"gram-guessing\" in the garage.\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\n\n\u003ch3\u003eDetailed Model Fitment (16x13mm)\u003c\/h3\u003e\n\n\u003ctable\u003e\n\n  \u003cthead\u003e\n\n    \u003ctr\u003e\n\n      \u003cth\u003eBrand\u003c\/th\u003e\n\n      \u003cth\u003eCompatible Models\u003c\/th\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/thead\u003e\n\n  \u003ctbody\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eHonda\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003eRuckus (NPS50), Metropolitan (CHF50), and vintage Aero\/Elite models.\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eGY6 50cc\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003eTaoTao, Wolf, Bintelli, Ice Bear, and Pony 50.\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eGenuine\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003eBuddy 50, RoughHouse 50, and Black Jack 50.\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eYamaha\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003eZuma 50 (Bug-eye\/Horizontal), Vino 50 (2-stroke), and C3.\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/tbody\u003e\n\n\u003c\/table\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eBrands: Amstar, Amigo, Ascend, Baotian, Bashan, Blade, Boom, Chicago Scooter Company, Dongfang, Roketa, Baotian, Bashan, BMS, Cool Sports, E Ton, Fly Wing, Eagle, Fly, Italica, Riya, Ice Bear, Jackel, Jet Moto, JCL, Taotao, Peace, JM Star, Jonway, Kazuma, Keeway, KMD, Kymco, Lance, Lifan, Linhai, Loncin, Longbo, Fuxin, Jiajue, Tao Tao, Tao Motors, Trailmaster, Maxtrade, Meitien, Motofino, Motorino, NST, Panterra, Panther, Qlink, Yiben, Red Streak, Redcat, Roketa, Schwinn, Strada, SYM, Tank, Terminator ,Tomberlin, TNG, United Motors, Vento, Vitacci, Wildfire, Wolf, X-Treme, X-Pro, Yongfu, ZNEN, Zhongneng , Zhilong, Geely, Wangye, ZH and more Manufactured by: Taizhou Zhongneng Motorcycle Co.; Jiangsu Zhongneng Motorcycle Co.; Jiangsu Meijunte Technology Co.; Taizhou Qianxin Vehicle Co.; Ningbo Dongfang Lingyun Vehicle Made Co.; Taizhou Zhilong Technology Co.; Zhejiang Jiajue Motorcycle Manufacturing Co.; Zhejiang Gelly Ming Industrial Co.; Taizhou City Senglong Motorcycle Manufacture Co.; Jiangsu Sacin Motorcycle Co.; Jiangsu Linhai Power Machinery Group Co.; Zheijiang TaoTao Vehicles Co.; Zhejiang Senling Motorcycle Co.; Sanmen County Yongfu Machine Co; Taizhou Jiaojiang Zhiwei Motorcycle Manufacture Co.; Huzhou Daixi Zhenhua Technology Trade Co.; Taizhou Zhongneng Motorcycle Co.; Zhejiang Riya Motorcycle Co.; Ningbo Longjia Motorcycle Co.; Taizhou Zhongneng Motorcycle Co.; and more\u003c\/p\u003e","brand":"Prima","offers":[{"title":"Default Title","offer_id":67964581740865,"sku":"1400-1069","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-7233-0-1400-1069_7bda5030-a9fa-4e16-be14-0e16396b71d5.jpg?v=1792557873"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/collections\/RACING-FLAG-200_1.jpg?v=1792563001","url":"https:\/\/azscooterparts.com\/collections\/scooter-gy6-139qmb-49cc-performance-parts.oembed","provider":"AZScooterParts","version":"1.0","type":"link"}