R12 Chassis 90T 64-Pitch Spur Gear Upgrade - Yokomo YOKR12-6490 (Black)  [YOKR12-6490]

R12 Spur: 90T 64-Pitch Overview

The Yokomo YOKR12-6490 delivers a 90-tooth, 64-pitch spur option tailored to R12 chassis applications, designed to give predictable engagement through precise tooth profiling. It is presented as a tuning component for adjusting gear ratios at a fine scale without the need to alter the pinion.

Fitment and role: intended for R12-series configurations that accept 64-pitch gears, this spur acts as the main driven gear meshing with the motor pinion to determine the car's gear ratio. Using a different tooth count will affect acceleration and top speed characteristics, so this item suits incremental tuning goals rather than major drivetrain changes.

Installation notes: make sure your chassis runs 64-pitch gears before fitting, set the mesh so the contact pattern is even across teeth, and ensure the spur mounts flat on its hub with no side play. After installation, inspect bearings and drivetrain alignment to reduce the risk of uneven wear; handle with RC-scale tools and care.