48-Pitch 81 Tooth Spur - Yokomo YOKSG4881  [YOKSG4881]

Tuning and performance overview

This Yokomo YOKSG4881 spur gear is supplied as a 48 pitch, 81 tooth replacement spur for RC applications. It suits 48 pitch systems where adjusting tooth count is the primary method to alter the vehicle's overall gearing and driving characteristics. The following guidance focuses on performance implications and practical tuning advice rather than undocumented specifications.

Compatibility: intended for use in drivetrains and gearboxes that accept 48 pitch spur gears; always verify your model uses 48 pitch before swapping parts. An 81-tooth spur yields a greater reduction than smaller spurs, typically boosting wheel torque and easing acceleration while lowering theoretical top speed for a given motor and pinion.

Installation notes: ensure any required clearance around the slipper and motor mount is addressed, set proper backlash between pinion and spur to reduce wear, and check that the motor pinion aligns centrally with the spur to prevent mis-mesh. After fitting, run a gentle break-in at low throttle while watching for unusual noise, then re-check mesh and fasteners.

Tuning role: swapping to an 81-tooth spur is an effective way to change throttle response and acceleration without touching motor timing or ESC parameters. Combine spur and pinion choices to reach your desired final ratio, and confirm clearance with chassis components and transmission housings before full use.