{"product_id":"gy6-up-gear-kit-15-38-for-increase-top-speed","title":"GY6 Up-Gear Kit 15*38 for Increase Top Speed","description":"\u003ch2\u003e15*38 Up-Gear Kit for GY6 Engines\u003c\/h2\u003e\u003cp\u003eThis 15*38 up-gear kit is made to raise the top speed and widen the usable rev range on a GY6 engine. Its final drive ratio is 18% higher than the standard 13*40 setup, which makes it a good match for riders who also run a big bore kit. It is one of the \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 scooter parts\u003c\/a\u003e that can noticeably change how a scooter performs.\u003c\/p\u003e\u003ch3\u003ePerformance Gains\u003c\/h3\u003e\u003cp\u003eThe gear set is built specifically for GY6 engines and delivers a clear gain in top-end speed. Fitting it means reusing the original 42-tooth counter shaft gear, and a 50-ton gear press is needed to seat everything correctly. Doing it this way helps the fit stay secure and lets the engine make the most of the change.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront Counter Shaft:\u003c\/strong\u003e 15 teeth\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\u003eRatio Increase:\u003c\/strong\u003e 18% over stock setup\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in Taiwan, ISO 9001 certified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e GY6 150cc (157QMJ) engine, with other 157QMJ-based 125cc, 150cc and 169cc engines by engine code\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eSuitable for:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGY6 150cc (157QMJ) engine (157QMJ, YN1P57QMJ, 1P57QMJ, JJ157QMJ, BN157QMJ)\u003c\/li\u003e\n\u003cli\u003eGY6 125cc and 169cc engines with 157QMJ-based codes (161QMK, 152QMI, 1P61QMK, 1P52FMI, 154FMI, BN161QMK-A, other QMJ \/ QMK \/ QMI)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to pick the right one:\u003c\/strong\u003e Find your engine code stamped on the engine case and check it against the list: 157QMJ, 161QMK, 152QMI, 1P61QMK, 1P52FMI, 154FMI, or any other QMJ\/QMK\/QMI code.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eLocation on the diagram:\u003c\/strong\u003e part #17 on the transmission diagram for the GY6 150cc (157QMJ).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBrowse further:\u003c\/strong\u003e \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/chinese-scooter-parts\"\u003eChinese Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-transmission\"\u003eScooter Transmission \u0026amp; Final Drive\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"Default Title","offer_id":51138639200313,"sku":"TT-26511","price":57.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/gy6-up-gear-kit-15-38-for-increase-top-speed-1.webp?v=1794376505","url":"https:\/\/www.trendtimes.com\/products\/gy6-up-gear-kit-15-38-for-increase-top-speed","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}