48 Pitch Spur Gear 81T for 48 Pitch Drivetrains - Yokomo YOKSG4881  [YOKSG4881]

Installation and setup for 48 pitch spurs

This Yokomo YOKSG4881 spur gear is an RC-scale replacement part specified as a 48 pitch, 81 tooth spur gear. It is intended for use in 48 pitch gear systems where changing tooth counts tunes overall gear ratio, affecting acceleration and top speed. The notes below concentrate on installation and practical setup advice rather than technical specs not listed with the part name.

Compatibility: this part fits 48 pitch drivetrains and gearboxes that accept 48 pitch spur gears; confirm your chassis uses 48 pitch before fitting. When you move to an 81-tooth spur, expect a lower effective gear ratio versus smaller spurs, which generally raises torque at the wheels and lowers top speed for the same motor and pinion combination.

Installation notes: remove any slipper or motor mount clearances required by your chassis, set pinion and spur mesh with the correct backlash to prevent premature wear, and make sure the motor pinion aligns with the spur centerline to avoid binding. After installation, run the model gently at low throttle while checking for noise or uneven rotation, then re-check mesh and fastener tightness.

Tuning role: fitting an 81-tooth spur is a simple method to adjust acceleration and throttle response without altering motor or ESC settings. Combine the spur change with appropriate pinion swaps to obtain the target overall ratio, and always verify clearance with the chassis, transmission housings, and any aftermarket diff components.