GY6 GY7 Performance Up-Gear Kit 14*36/37/38
ITEM# TT-26671
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Description
Performance Up-Gear Kit for GY6 and GY7 Engines
This 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 GY6 scooter parts that can noticeably enhance how your scooter rides.
Gear Ratio Selection
Changing 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.
Compatibility and Fitment
This 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.
Specifications
- Counter Shaft Teeth: 14
- Driven Gear Options: 36T, 37T, 38T
- A-Block Fitment: 54mm stud spacing
- B-Block Fitment: 57mm stud spacing
- Origin: Made in Taiwan (ISO 9001 certified)
- Fits: GY6 engines (A-block 54mm and B-block 57mm stud spacing), 125cc, 150cc and 169cc, engine codes QMJ, QMK
Fitment
Fits:
- GY6 150cc engines (157QMJ, YN1P57QMJ, 1P57QMJ, JJ157QMJ, BN157QMJ)
- GY6 engines with 161QMK, 1P61QMK and BN161QMK-A codes
- GY6 engines with 152QMI, 1P52FMI and 154FMI codes
- GY6 125cc, 150cc and 169cc engines with other QMJ, QMK or QMI codes
- GY6 engines with FM in the engine code (likely compatible)
How to choose: 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.
Shop more: GY6 Scooter Parts · Chinese Scooter Parts · Scooter Transmission & Final Drive · Scooter Parts
Additional Information
| Options |
14X36, 14X37, 14X38 |
|---|
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