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

Rocker shaft fixing for FZ53 and FZ63

This aftermarket rocker arm shaft screw is made for YS Engine FZ53 and FZ63 assemblies. It functions as the retaining fastener for the rocker arm shaft, helping maintain correct valve alignment during engine setup and service.

Always keep the area free of debris and check the rocker arm and shaft for signs of wear before installation. Ensure correct thread engagement and use torque appropriate to small model engine hardware to prevent thread damage or vibration loosening. Intended for model engine repair and tuning tasks only.

The screw supports valve adjustments and component swaps when refurbishing the rocker assembly and should be inspected whenever the rocker mechanism is worked on.