GY6 125/150cc Scooter 15/36 Upgear Set
ITEM# TT-26484
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Description
15/36 Gear Set for GY6 125cc and 150cc Scooters
This 15/36 upgear set is built to raise the performance of compatible GY6 125cc and 150cc scooter transmissions. Its gearing sits 22% higher than the stock 13/40 set, which can help with higher top speed and a broader usable rev range. It is a key item among GY6 150cc scooter parts for big-bore builds that need the extra gearing to make full use of the added power.
Performance Upgrade
The kit contains a 15-tooth countershaft gear and a 36-tooth final-drive gear, giving a longer, taller ratio than the factory setup. Riders chasing the most from a performance build will find this change useful, as it can support quicker acceleration and higher speed, which suits racing use.
Installation Notes
Installing this set means keeping the factory 42-tooth countershaft gear in place. Assembly calls for a press and some prior transmission experience. Note that this performance part is intended for off-road use only and is not meant for public roads.
Specifications
- Countershaft Gear: 15 teeth; spline length 24 mm; outer diameter 31.1 mm; overall length 60 mm
- Press-On Section: 12.08 mm long × 19.08 mm outer diameter
- End Sections: 9–10.5 mm long × 15 mm outer diameter
- Final-Drive Gear: 36 teeth; 19 internal splines; 71.2 mm outer diameter; 18 mm inner diameter; 20 mm width
- Reference Stock Gear Set: 13/40
- Country of Origin: Taiwan
- Fits: GY6 150cc (157QMJ) transmission
Fitment
Fits:
- GY6 150cc (157QMJ)
Where it goes: part #17 on the transmission diagram for the GY6 150cc (157QMJ).
Other versions: For GY6 125cc and 150cc engines using the 16x38 gear set: GY6 125cc/150cc Engines Upgear Set 16x38.
Shop more: GY6 150cc Scooter Parts (157QMJ) · GY6 Scooter Parts · Scooter Parts
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