Yokomo YOKPG6428 R/C 28T 64-Pitch Pinion  [YOKPG6428]

Compatibility and ratio adjustment details

The Yokomo YOKPG6428 pinion is designed for R/C pinion gear use and typical drivetrain assemblies. Its 64 pitch and 28-tooth count set the tooth spacing and number required to mesh correctly with a spur gear of the same pitch.

Use this item as a direct replacement or as part of tuning experiments; changing the pinion tooth count adjusts the gear ratio and influences whether the model favors acceleration or top speed. It is not intended for use in actual vehicles.

Fitment checklist: confirm matching pitch, align the pinion for consistent tooth contact on the spur, secure the set screw(s) appropriately, and check axial alignment of the motor shaft. Turn the drivetrain by hand post-install to confirm smooth operation prior to full power runs.

Tuning considerations: always swap pinions while keeping the same pitch on the spur, assess the contact patch under light load, and perform controlled trials to evaluate the effect of each pinion change on your model's performance.