GPM KM013TS Kyosho Motorcycle 13T Steel Pinion  [KM013TS]

13T steel motor pinion for Kyosho motorcycle models

This 13-tooth motor pinion is a direct-fit replacement and tuning option for Kyosho motorcycle models that accept a 13T pinion. Machined in steel #45 and supplied as a single piece, it replaces a worn or damaged gear without modifying the motor or gearbox housings.

Using a 13T pinion changes the final drive ratio, affecting acceleration and top speed depending on the spur gear selection. The steel #45 construction gives improved wear resistance and consistent tooth engagement compared with softer materials, making it a solid choice for maintenance and performance tweaks.

Installation tip: remove the motor following your model's service instructions, slide the pinion onto the motor shaft with correct axial alignment and mesh to the spur gear, then fasten using the original method. Rotate the drivetrain by hand to confirm smooth mesh and no binding before powering the model.