This 13T motor gear is intended as a straightforward replacement or a tuning upgrade for Kyosho motorcycle models that use a 13T pinion. Manufactured from steel #45 and sold as a single unit, it allows swap-out without changing motor or gearbox housings.
A 13-tooth pinion influences the final drive behaviour, trading off acceleration against top speed depending on the spur gear choice. Steel construction improves abrasion resistance and maintains reliable tooth contact under routine running compared with softer materials.
Fitment note: remove the motor per your model instructions, fit the gear onto the motor shaft making sure axial position and mesh are correct, then secure it with the original fastening method. Manually turn the drivetrain to ensure smooth engagement before applying power.
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