The KO Propo 99103 5th Gear upgrades RSx 12 servos with improved load handling and cleaner mesh behavior. It is a straightforward replacement for pilots wanting steadier steering and throttle control in demanding use.
This part is machined to sit correctly in the RSx 12 gear stack, helping to cut vibration and extend intervals between services. Durable materials minimise wear even when running hard on track or trail.
When installing the KO Propo 99103 5th Gear, remove debris and inspect other gears for wear. Adjust gear mesh to the recommended clearance and test under low load before full use.
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