PROMOTO-MX 7075 Aluminium Gearbox Housing MX038A by GPM  [MX038A]

7075 aluminium gearbox housing tailored for PROMOTO-MX

This 7075 aluminium transmission housing is an aftermarket RC replacement intended for LOSI Promoto-MX motorcycles. Manufactured from 7075 aluminium as referenced in the source, the housing replaces the original plastic shell on the listed Promoto-MX models to improve stiffness and long-term drivetrain reliability.

The product ships with a single 5x13x4 bearing to match the supplied mounting interfaces. It fits using the motorcycle's current fasteners and drivetrain parts; during installation check bearing seating and alignment to prevent preload or misalignment of spur and pinion engagement.

Functionally the part reduces flex around the gearbox area and protects internal gears from impact or wear during aggressive use or when fitting higher-power motor and ESC setups, while retaining the same service access points as the standard housing.

For model technicians and hobbyists upgrading PROMOTO-MX bikes, this GPM aluminium housing offers a direct-fit replacement focused on gearbox stiffness; always verify compatibility with the listed models and inspect bearing seating during rebuilds.