Futaba FU1K13201 Replacement First Gear for Futaba S9450 Servos  [FU1K13201]

Fitment and Compatibility Notes for S9450

The FU1K13201 is a Futaba first gear intended as a direct replacement for Futaba S9450 servos. It replaces the internal gear that can fail due to wear or damage, restoring correct drivetrain operation.

Compatibility is confined to the servo models cited in the product title, so verify the S9450 designation before buying. Installation requires opening the servo case, removing the output gear train and reassembling with correct gear mesh and bearing alignment. Use a light, appropriate grease on teeth and avoid over-tightening screws to prevent binding.

Installing a new first gear can bring back precise center finding and consistent speed behaviour, supporting accurate steering and actuator feedback in small-scale RC models. After fitting, check full range motion and listen for any unusual noise before returning the servo to regular use.