Kyosho Mini-Z AWD Precision Alloy Pinions 15T 17T 19T 21T MZA15171921T by GPM  [MZA15171921T]

Mini-Z AWD precision pinion set

This precision-machined aluminium pinion set is supplied for Kyosho Mini-Z AWD drivetrains and covers standard pinion sizes used in Mini-Z AWD motor modules. The 15T, 17T, 19T and 21T options allow systematic final drive changes without modifying the spur gear or motor assembly.

Engineering notes: manufactured from CNC-friendly aluminium alloy to reduce wear and minimise rotational inertia for micro-scale drivetrains. The parts are intended for robust replacement use and for fine tuning final drive ratios to balance acceleration, top speed and motor load.

Service and installation: remove motor from mounting, release current pinion fastener, install selected tooth-count pinion ensuring correct axial location and backlash with the spur, then secure and verify endplay. Use precision hex tooling and controlled torque values to avoid damage to motor shaft threads and maintain repeatable mesh settings.

Tuning strategy: lower tooth counts (15T) reduce gear ratio for higher top speed but lower acceleration, while higher counts (21T) increase torque at the wheels and improve low speed response; choose pinion size based on circuit demands and motor characteristics.