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

Compact 21T motor gear summary

This single alloy motor gear is made as a 1pc replacement for Kyosho Mini-Z AWD models using the MR-03 AWD motor layout, supplied with a mounting screw. The 21T tooth count matches common Mini-Z pinion ratios and serves as a direct swap when the original pinion shows wear or when changing gear ratios for setup work.

Installation is simple: slide the gear onto the motor shaft and secure with the supplied screw, then check gear mesh and axial alignment for quiet, even engagement with the spur. This component is intended for RC scale models only and is not suitable for full-size vehicles.

As a tuning item, the 21T pinion alters the final drive ratio and can be paired with different spur sizes to tune acceleration and top speed for tight indoor circuits. Inspect the gear teeth and mounting screw regularly as part of routine maintenance.