This is an R/C scale 88-tooth spur gear using a 64 pitch tooth profile supplied under the Yokomo part code YOKR12-6488S. It is intended as a straightforward replacement or spare for general R/C gearbox applications where a 64 pitch gearset is specified.
In practical terms the gear serves the drivetrain role of transferring motor pinion rotation through the gearbox to the final drive; matching the pitch and tooth count to the existing pinion is essential to maintain proper mesh and reduce wear on teeth and bearings.
Installation notes: verify the pinion engages the spur across the full tooth face, check backlash and avoid axial preload on the gear bearings, and run a short break-in at moderate throttle to allow any finish irregularities to settle before full use.
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