YS Engine models Intake Tappet Adjuster YSF2013  [YSF2013]

Adjusting screw for intake tappets on YS engines

This YS Engine YSF2013 intake tappet adjusting screw is supplied as an RC replacement to correct or refine intake tappet clearance on YS Engine units. The part is a mechanical element in the valve train, enabling small, repeatable changes to tappet position to support consistent engine performance.

To fit the part, follow the engine service manual: remove the valve cover, extract the old adjuster, fit the YSF2013 screw, and set the required clearance either by feel or with a standard feeler gauge. Ensure you follow the manufacturer's torque and reassembly instructions during refit.

For maintenance and competition preparation the adjuster helps with repeatable clearance checks and modest timing consistency. Always inspect the thread condition and seating when installing, and perform a bench run to confirm a steady idle and reliable throttle response prior to operation.