MRX-5 7075 Pulley Upgrade - MUGEN AM-MRX5-H2201  [AM-MRX5-H2201]

MRX-5 pulley tuning part

This Arrowmax pulley kit is supplied as an aftermarket replacement specifically for the MUGEN MRX-5 chassis. Manufactured from 7075 aluminium, the set focuses on tight tolerances and surface hardness to keep drivetrain response consistent during track sessions and adjustments.

Fitting is aimed at users familiar with MRX-5 servicing: ensure correct seating on the spur and pinion, inspect bearing alignment, and verify free rotation before finishing the rebuild. The pulleys serve to simplify gearbox checks and help isolate slack or misalignment during setup.