G- Final Drive Gear 52 (139QMB longcase)

Description: Final Drive Gear 52 Teeth direct stock replacement for 139QMB 49/50cc 4-stroke longcase engines. The final drive ratio is the last bit of gearing between your transmission and the driven wheels. In general, a lower final drive ratio will lead to less torque at the wheels but higher top speed. Meanwhile, a higher ratio will result in the opposite, i.e. more torque at the wheels but lower top speed. 

NOTE: Not included, must reuse stock counter shaft gear.

Specifications:

Include the following Final drive gear.

•    1x Rear Final Drive Gear Teeth: 52 / Inner Spline: 19
•    OD: 80.9mm / ID: 18mm / W: 15.7mm
•    Made in Taiwan
•    Fit QMB 49/50cc (longcase)

Supported Models: GY6 50; 139QMB 49/50cc engines, Genuine Buddy 50, Genuine RoughHouse 50, Kymco Filly 50, QLink, SYM 50, TaoTao 50, and virtually any scooter engine with these measurements.