Kyosho Motorcycle Alloy Main Gear by GPM KM155  [KM155]

Alloy main gear for Kyosho bikes

This aftermarket alloy main gear is an RC-scale replacement part produced by GPM for Kyosho motorcycle model platforms, supplied as 1 pcs. It is intended for use in small motorcycle drivetrains where the spur gear or main gear needs replacement or upgrading.

Use this part to restore worn teeth, maintain correct gear mesh, or when swapping gear ratios during tuning. As an aluminium main gear, it offers consistent tooth form and resistance to light wear compared with typical plastic gears, while remaining an RC-specific component for model transmissions.

Installation notes: confirm gear mesh and axial alignment with the motor pinion and gearbox output, check fit on the shaft and secure with the original retaining hardware, and rotate the drivetrain by hand before powering the model to verify smooth engagement. Use correct ball bearings and mounting hardware as specified by your Kyosho model manual.