Mugen MRX-5 1st Gear 18T Precision Pinion - Arrowmax AM-MRX5-H0759  [AM-MRX5-H0759]

Durable 1st gear pinion for MRX-5

Designed for compatibility with the Mugen MRX-5, the Arrowmax AM-MRX5-H0759 1st Gear 18T is made from 7075-T6 aluminium with a protective hard coat to reduce wear during use. It works as a direct replacement or an upgrade choice for MRX-5 clutch gear assemblies.

The pinion transmits torque from the motor pinion to the spur gear and the hard-coated aluminium helps keep contact patches consistent for accurate gear meshing. It fits MRX-5 spur arrangements and is useful when changing tooth counts to refine drivability.

Tooth count choices include 16T, 17T, 18T, 19T, 20T and 21T so you can alter gear ratios without touching the motor pinion. Always verify spline fit and clutch seating on your MRX-5 before finalising assembly to avoid excessive backlash or misengagement.