Kyosho Motorcycle Main Gear Delrin Upgrade DKM155 by GPM  [DKM155]

Low-friction Delrin main gear for Kyosho bikes

This Delrin main gear is an aftermarket replacement crafted for Kyosho motorcycle models. Sold as a single piece, it installs where the main gear mates with pinion and spur to transmit motor torque. Delrin's low friction and good wear properties suit plastic-to-plastic gear meshes commonly found in electric motorcycle kits.

Fitting is aimed at hobbyists comfortable with small gear trains: open the gearbox cover, remove the worn main gear, and fit the replacement using the existing bearings and hardware. On reassembly, verify axial play and set correct mesh so you avoid excessive backlash or binding; a small clearance along the tooth face is expected with Delrin gears.

Setup advice: Delrin can run quieter than harder plastics but will need periodic checks if you push rpm or change gearing aggressively. Use a small amount of plastic-safe grease on contact faces only if required, and check pinion alignment and bearing smoothness to maintain even mesh.