Futaba FU1K13201 Servo First Gear - Replacement for S9450 Models  [FU1K13201]

First Gear Service Guide for S9450

This FU1K13201 unit is a Futaba first gear supplied as a replacement for Futaba S9450 servos. It is intended to repair or renew the internal drivetrain when the original gear becomes worn.

Only the models listed in the product title are compatible, so confirm the S9450 marking before ordering. Fitting the gear requires opening the servo housing, removing the output train and refitting components while maintaining correct gear mesh and bearing alignment. Apply light, purpose-made grease sparingly and avoid over-tightening fasteners to reduce the risk of binding.

Replacing the first gear often improves center finding and delivers steadier speed response, which helps for precise steering and actuator feedback in compact RC models. After installation, run the servo through its full range and check for abnormal sounds before putting it back into use.