YS Engine Intake Tappet Adjusting Screw for YS Engine models - YSF2013  [YSF2013]

Precision intake tappet adjuster for YS Engine units

This YS Engine YSF2013 intake tappet adjusting screw is an RC-scale replacement part made to restore or fine-tune intake tappet clearance on YS Engine units. The component operates as a mechanical valve train adjuster, permitting small, repeatable changes to tappet position for steady running.

Fitting is straightforward for anyone familiar with RC engine servicing: remove the valve cover following your engine service manual, withdraw the old adjuster, install the YSF2013 screw, and set clearance by feel or with a standard feeler gauge where suitable. Always follow the engine maker's assembly order and torque specs when reassembling.

For tune-ups and race preparation the part supports repeatable clearance checks and helps keep timing consistency. Inspect thread condition and seat engagement during installation, then bench-run the engine to confirm a steady idle and consistent throttle response before using in the field.