Kyosho Motorcycle #45 Motor Gear Set (11T, 12T, 13T) by GPM KM123TS  [KM123TS]

Motor pinion gear set for Kyosho bikes

This is an aftermarket motor pinion gear set produced by GPM for Kyosho Motorcycle applications. The kit includes three steel #45 pinions in 11T, 12T and 13T counts, supplied as a 3pcs set to support basic tuning changes and replacement of worn pinions on RC motorcycle-scale setups.

Use these gears when you need slightly different final drive ratios or when the original pinion shows wear. Steel #45 offers a balance between hardness and machinability for small-scale motor gear use; switching between the included sizes lets you fine-tune acceleration versus top speed in model-appropriate tuning work.

Installation overview: remove the motor pinion retaining method used on your Kyosho Motorcycle, swap the pinion, ensure correct gear mesh with the spur or gearbox input, and verify smooth rotation before powered runs. Allow for a short break-in period and re-check mesh after initial testing.