Blue Line Rear Axle / Output Shaft for 139QMB 50cc | 133mm Honda XR100 Start with the 1000 RPM

Start with the 1000 RPM set and adjust from there based on your riding style

Overall Height (bell): 34mm

This kit is a 27% upgear from the stock 13*40 gear set

157QMJ 161QMK 152QMI 1P61QMK YN1P57QMJ 1P52FMI 154FMI JJ157QMJ 1P57QMJ BN157Q

Blue Line Rear Axle / Output Shaft for 139QMB 50cc | 133mm Honda XR100 Start with the 1000 RPMA replacement rear axle (also called output shaft or final drive shaft) for 139QMB based 50cc 4 stroke scooter engines. Fits Chicago Scooter Company go, go MAX, Bella Classic 50, Pug 50, and Nitro Sport 50, as well as any scooter running a 139QMB or compatible engine code. SKU: 151 55. Direct OEM replacement rear axle output shaft final drive shaft 20 spline ends for positive gear engagement Fits 139QMB and compatible 50cc 80cc 4 stroke engine codes