{"product_id":"gy6-gy7-performance-up-gear-kit-14-36-37-38","title":"GY6 GY7 Performance Up-Gear Kit 14*36\/37\/38","description":"\u003ch2\u003ePerformance Up-Gear Kit for GY6 and GY7 Engines\u003c\/h2\u003e\u003cp\u003eThis up-gear kit fits GY6 and GY7 engines and lets you change the final drive ratio without much hassle. It includes a 14-tooth counter shaft gear along with driven gear choices of 36, 37, or 38 teeth. With these options you can fine-tune your scooter, trading off between top speed and acceleration. It is one of the \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 scooter parts\u003c\/a\u003e that can noticeably enhance how your scooter rides.\u003c\/p\u003e\u003ch3\u003eGear Ratio Selection\u003c\/h3\u003e\u003cp\u003eChanging the driven gear alters the final drive ratio, which changes how power reaches the wheel. A stock GY6 150cc setup generally runs a 14-tooth counter gear paired with a 40-tooth driven gear. A 36-tooth driven gear raises top speed but reduces low-end torque. The 37-tooth option is a middle-ground upgrade, and the 38-tooth option stays near the original ratio with a small gain in top speed.\u003c\/p\u003e\u003ch3\u003eCompatibility and Fitment\u003c\/h3\u003e\u003cp\u003eThis kit works with both the 54mm stud spacing and 57mm stud spacing GY6 engine families. It covers a range of models and engine codes, so it suits many scooter owners. If your engine code contains \"QM\" or \"FM\", it is likely to be compatible.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounter Shaft Teeth:\u003c\/strong\u003e 14\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDriven Gear Options:\u003c\/strong\u003e 36T, 37T, 38T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA-Block Fitment:\u003c\/strong\u003e 54mm stud spacing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eB-Block Fitment:\u003c\/strong\u003e 57mm stud spacing\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 engines (A-block 54mm and B-block 57mm stud spacing), 125cc, 150cc and 169cc, engine codes QMJ, QMK\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGY6 150cc engines (157QMJ, YN1P57QMJ, 1P57QMJ, JJ157QMJ, BN157QMJ)\u003c\/li\u003e\n\u003cli\u003eGY6 engines with 161QMK, 1P61QMK and BN161QMK-A codes\u003c\/li\u003e\n\u003cli\u003eGY6 engines with 152QMI, 1P52FMI and 154FMI codes\u003c\/li\u003e\n\u003cli\u003eGY6 125cc, 150cc and 169cc engines with other QMJ, QMK or QMI codes\u003c\/li\u003e\n\u003cli\u003eGY6 engines with FM in the engine code (likely compatible)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Pick the stud spacing that matches your engine: 54mm for A-block or 57mm for B-block. Then select 36T, 37T, or 38T for the driven gear.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop more:\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":"14X36","offer_id":51138660106297,"sku":"TT-26671","price":59.98,"currency_code":"USD","in_stock":true},{"title":"14X37","offer_id":51138660139065,"sku":"TT-26672","price":59.98,"currency_code":"USD","in_stock":true},{"title":"14X38","offer_id":51138660171833,"sku":"TT-26673","price":59.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/performance-up-gear-kit-14-36-37-38-for-gy6-gy7-1.jpg?v=1794376623","url":"https:\/\/www.trendtimes.com\/products\/gy6-gy7-performance-up-gear-kit-14-36-37-38","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}