RC Motor Pinion 31T 64-Pitch Ultra-Hard - Yokomo YOKPG6431  [YOKPG6431]

64-Pitch 31-Tooth Pinion Overview

This Yokomo YOKPG6431 pinion is sized at 31 teeth and manufactured for 64-pitch systems as a motor pinion replacement. The ultra-hard treatment is a surface hardening process meant to improve wear resistance while preserving correct tooth geometry for dependable engagement.

Use this pinion with a compatible 64-pitch spur gear. Verify tooth count, bore size and shaft compatibility before fitting. Avoid forcing components together; proper alignment will reduce the chance of early failure.

Fitting tips: slide the pinion onto the motor shaft squarely, secure with the original set screw or key, and establish gear mesh using the paper method to prevent binding or excessive backlash. After the first runs, retighten the set screw and ensure the pinion spins freely.

Tuning notes: switching pinion tooth counts changes final drive ratio and the load on the motor. A 31T pinion will alter RPM relative to the spur gear used; change one tooth at a time when tuning for different acceleration or top-end characteristics, and keep an eye on motor temperature and drivetrain noise following adjustments.