{"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","url":"https:\/\/azscooterparts.com\/products\/gear-set-1638-gy6-150cc-ncy-brand","provider":"AZScooterParts","version":"1.0","type":"link"}