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

Mini-Z AWD alloy motor gear overview

This is a single alloy motor gear intended for Kyosho Mini-Z AWD platforms, supplied as a 1pc set with the mounting screw included. The 21T tooth count matches common Mini‑Z motor pinion ratios used on MR-03 AWD layouts, offering a direct replacement when the original gear is worn or when changing gearing during setup.

Fitment and function are straightforward: the gear mounts to the motor shaft and secures with the included screw. Check gear mesh and axial alignment after installation to ensure smooth engagement with the spur gear and to avoid premature wear. This part is an RC-scale replacement component for small‑scale models and not for full‑size vehicles.

From a tuning perspective, swapping a 21T motor gear affects final drive ratio and can be used alongside spur changes to refine acceleration and top speed for specific indoor track conditions. Regular inspection of the gear teeth and the securing screw is recommended as part of routine maintenance.