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

Use cases and role

The steel main gear SKM155 is an aftermarket replacement suited to Kyosho motorcycle platforms using the same gear dimensions. It serves as a direct-fit spur in the gearbox and pairs with standard RC drivetrain components used on scale bikes.

Because it is steel, the gear focuses on durability and reduced wear compared with typical plastic spurs, making it suitable for model owners who want longer-lasting gearbox performance. The part helps retain consistent gear engagement during regular hobby use.

Fitting the gear is a straightforward maintenance task: remove the gearbox cover, verify tooth count and bore against the original, fit the gear to the shaft with correct axial positioning, set mesh to the pinion, and reassemble while checking for smooth rotation. Replace any worn mating parts found during inspection.