The item carrying the Yokomo YOKPG6440 reference is a 40-tooth pinion manufactured for 64 pitch gear systems and offered as a replacement or spare component. It is defined by pitch and tooth count and is intended for electric R/C applications using 64 pitch gears.
Compatibility requires a matching motor shaft diameter and the correct spur gear pitch; verify both before buying. The unit is supplied as the gear alone without additional fixing parts.
To fit: expose the motor shaft, mount the pinion, set the mesh to achieve smooth tooth engagement without excessive backlash or binding, then secure with the motor's original retention hardware. Never force the pinion onto an incorrect shaft and always validate mesh at low throttle before full use.
Gearing advice: changing pinion tooth count adjusts the final drive ratio — 40 teeth at 64 pitch is a moderate step for tuning speed versus acceleration. Periodic mesh and wear checks will help sustain drivetrain reliability.
Copyright © 2008-2026 rcjaz.co.uk All rights reserved
