Team Losi Promoto-MX Motorcycle Aluminum Rear Brake Disc by JAZRIDER JR-LMX07-BK  [JR-LMX07-BK]

Rear brake disc for Promoto-MX

This is an aluminum rear brake disc made for Team Losi Promoto-MX motorcycle models, supplied by JAZRIDER as JR-LMX07-BK. It is a direct replacement-style accessory intended for use on scale motorcycle models rather than full-size vehicles.

The disc's role is mechanical: it replaces a worn or damaged rotor on the rear brake assembly and provides a stable mounting surface for the brake pads. Fitment follows the Promoto-MX motorcycle layout as implied by the product name, so verify your model matches the Promoto-MX designation before ordering.

Installation is a routine model-level task. Remove the wheel and existing rotor, transfer any necessary spacers or mounting hardware, then fit the replacement disc and check clearance and pad alignment. After installation, perform low-speed bench tests on the model to confirm smooth brake engagement before full-range operation.

Tuning and maintenance notes: use the disc as part of your brake system maintenance cycle, inspect for wear or deformation after heavy use, and ensure fasteners are secure. The black finish is an aesthetic and protective surface treatment; treat it like any model part during handling and cleaning.