This aftermarket motor pinion gear kit suits Kyosho Motorcycle installations. It contains three steel #45 pinions in 11T, 12T and 13T, delivered as a 3pcs pack to support simple tuning changes and to replace worn motor pinions on scale motorcycle models.
Use the different tooth counts to adjust the effective final drive: lower tooth counts favour top speed while higher counts favour acceleration. Steel #45 provides a practical compromise of toughness and ease of manufacture for small motor pinions.
Installation notes: remove the existing pinion retention, install the chosen pinion, set proper mesh with the spur or gearbox input and verify smooth rotation before use. Re-check mesh after a brief break-in run.
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