Kyosho Motorcycle Steel Main Gear Replacement SKM155 by GPM  [SKM155]

Purpose and fit

This steel main gear is supplied as an aftermarket replacement for Kyosho motorcycle platforms that share the same gear form factor. It fits into the existing gearbox layout and is compatible with common RC drivetrain components used on scale motorcycle models.

The steel construction helps reduce wear versus conventional plastic gears, supporting steadier gear engagement and longer intervals between replacements. The SKM155 is useful for hobbyists who prioritise gearbox longevity on scale bikes.

To install: remove the gearbox cover, verify tooth count and bore against the original gear, seat the gear on the shaft with correct axial location, check the mesh with the pinion, and reassemble while confirming smooth, free rotation. Inspect bearings and mating gears during the service to ensure overall drivetrain health.