GY6 Up-Gear Kit 15*38 for Increase Top Speed
ITEM# TT-26511
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Description
15*38 Up-Gear Kit for GY6 Engines
This 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 GY6 scooter parts that can noticeably change how a scooter performs.
Performance Gains
The 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.
Specifications
- Front Counter Shaft: 15 teeth
- Rear Final Drive Gear: 38 teeth | Inner Spline: 19
- Ratio Increase: 18% over stock setup
- Origin: Made in Taiwan, ISO 9001 certified
- Fits: GY6 150cc (157QMJ) engine, with other 157QMJ-based 125cc, 150cc and 169cc engines by engine code
Compatibility
Suitable for:
- GY6 150cc (157QMJ) engine (157QMJ, YN1P57QMJ, 1P57QMJ, JJ157QMJ, BN157QMJ)
- GY6 125cc and 169cc engines with 157QMJ-based codes (161QMK, 152QMI, 1P61QMK, 1P52FMI, 154FMI, BN161QMK-A, other QMJ / QMK / QMI)
How to pick the right one: 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.
Location on the diagram: part #17 on the transmission diagram for the GY6 150cc (157QMJ).
Browse further: GY6 Scooter Parts · Chinese Scooter Parts · Scooter Transmission & Final Drive · Scooter Parts
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