Mini-Z MR-03 AWD 21T Alloy Motor Gear Service Pinion MZA021T by GPM  [MZA021T]

21T alloy motor gear description

This is a single alloy motor gear supplied as a 1pc set for Kyosho Mini-Z AWD platforms using the MR-03 AWD motor layout, and it includes the mounting screw. The 21-tooth configuration aligns with typical Mini-Z motor pinions and provides a like-for-like replacement when the original gear is damaged or when altering gear ratios during setup.

To fit, slide the gear onto the motor shaft and secure with the supplied screw, then check the gear mesh and axial alignment to ensure smooth meshing with the spur gear and to prevent premature wear. This is an RC model component only.

Changing to a 21T motor gear alters the final drive ratio and is often used alongside spur changes to dial in acceleration and top speed for tighter indoor tracks. Inspect the teeth and clamp screw regularly as part of standard upkeep.