Yokomo YOKPG6438 64-Pitch 38T Pinion Gear for Electric RC Motor Gearing  [YOKPG6438]

Product Brief: 64-Pitch 38T Pinion Gear

The Yokomo YOKPG6438 is a 64-pitch, 38-tooth pinion gear designed for electric RC motor gearing. As an accessory it lets you change final drive ratios and fine-tune drivetrain behavior under varying load and course conditions.

Use this pinion where system geometry and gearbox specs call for 64-pitch components; it is not limited to a single chassis or motor type. Before installation, confirm the pinion tooth count and pitch match the spur and gearbox, and check the motor shaft diameter and set screw style to ensure a correct fit without forcing parts.

Installation notes: mount the pinion on the motor shaft with the correct axial position, set an appropriate gear mesh to avoid premature wear, and tighten fasteners to the manufacturer's torque recommendations. After initial fitting, rotate the drivetrain by hand to verify smooth engagement and check for binding or excessive backlash before powered runs.

Tuning role: switching to a 38T pinion shifts the final gearing toward a taller ratio compared with smaller pinions, which affects acceleration and top speed depending on the spur; use incremental changes and test runs to dial in performance.