Kyosho Motorcycle Pinion Set KM123TS 11T 12T 13T for tuning by GPM  [KM123TS]

Motor pinion upgrade for Kyosho motorcycles

This aftermarket motor pinion gear set is intended for Kyosho Motorcycle applications. The kit contains three steel #45 pinions in 11T, 12T and 13T counts, supplied as a 3pcs set to cover basic tuning swaps and replacement of worn motor pinions on small-scale motorcycle models.

Choose these pinions when you want to alter final drive ratios or replace a worn part. Steel #45 gives a practical balance of strength and machinability for motor-side gearing; swapping between the supplied sizes helps you tune acceleration versus top speed without changing the spur or gearbox layout.

Installation overview: remove your motor pinion retaining method, fit the chosen pinion, set correct mesh with the spur or gearbox input, and confirm free rotation before running. Allow a short running-in period and re-check mesh after initial testing.