YS Engine FZ53/FZ63 Rocker Arm Shaft Screw - YSF5132  [YSF5132]

YS Engine FZ53/FZ63 rocker arm shaft screw

This is a replacement rocker arm shaft screw sized for use with YS Engine FZ53 and FZ63 engine assemblies. The fastener secures the rocker arm shaft and helps preserve correct valve geometry during tuning and routine maintenance.

Before fitting, clean the mounting area and inspect the rocker arm and shaft for wear. Apply proper thread engagement and the recommended small-engine torque to avoid stripping or loosening from vibration. This part is intended solely for model engine maintenance and setup.

Use the screw when performing valve adjustments or replacing rocker assembly components, and verify its condition whenever the rocker arm or shaft is serviced.