Kyosho Mini-Z AWD Alloy Motor Gear (15T/17T/19T/21T) by GPM MZA15171921T  [MZA15171921T]

Mini-Z AWD alloy motor gear

This is an alloy motor gear set produced for Kyosho Mini-Z AWD platforms, supplied as a single set that covers common pinion sizes used in Mini-Z AWD motor assemblies. The set provides four tooth-count options—15T, 17T, 19T, and 21T—allowing straightforward gear-ratio adjustments without modifying the motor or spur gear.

Materials and role: the gear is made from an aluminum alloy to reduce wear compared with some stamped steel options while keeping rotating mass low for small-scale models, its primary role is to replace damaged pinions or to change final drive ratio for handling and acceleration tuning.

Installation notes: remove the motor from the motor mount, loosen the existing pinion on the motor shaft, fit the chosen tooth-count gear ensuring proper mesh with the spur gear, secure with the supplied screws, and check endplay and mesh under rotation. Use small hex drivers and moderate torque to avoid stripping the motor shaft or gear threads, and verify smooth meshing before running.

Tuning guidance: lower tooth counts (e.g., 15T) favor top speed at the expense of acceleration, while higher counts (e.g., 21T) increase acceleration and low-end response but may reduce peak speed; pick the tooth count based on track layout and motor/ESC gearing strategy.