Kyosho Motor Cycle Aluminium Gear Box by GPM KM012N  [KM012N]

Aluminium gearbox for Kyosho motorcycles

This aluminium gearbox is an RC-scale replacement hop-up designed for Kyosho motorcycle platforms where modified gear ratios are used. The unit focuses on providing a rigid, low-profile housing for spur and pinion interactions while keeping weight low for balance and handling adjustments. It is intended for hobbyists who change gear ratios for acceleration or top-speed trade-offs and need a stable gearbox that resists flex under load.

The housing fits into standard motorcycle engine bays in Kyosho chassis form factors, and its design accommodates common tuning changes without altering surrounding mounts. The aluminium construction improves heat dispersion compared with typical plastic housings and reduces deformation when using higher-torque motors or gearing. Installation requires basic disassembly of the original gearbox area, checking alignment of the pinion and spur, and verifying mesh with shims or minor plate adjustment.

Use this aluminium gearbox when changing gear ratios to maintain alignment and reduce flex, check gear mesh carefully during installation, and re-torque mounting fasteners after a run to ensure consistent performance.