The DMIF012T is a 12-tooth Delrin motor pinion made as an aftermarket option for Kyosho Mini Inferno models. It is the motor gear that engages the spur to establish the final drive ratio in 1/10 electric RC vehicles.
Delrin (acetal) is chosen for its low friction properties and quieter engagement in contrast to many metal pinions, offering a smoother-sounding drivetrain. A 12T pinion decreases the gear ratio relative to bigger pinions, improving initial throttle response while trimming top-end speed, which suits tighter track layouts.
Installation is conventional: remove the motor, fit the pinion to the motor shaft, set appropriate mesh with the spur, and tighten the set screw. Double-check rotation, clearance, and perform a cautious bench test to avoid early wear on either the pinion or spur gear.
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