YS Engine YSF7329 Piston Wrist Pin for FZ110S  [YSF7329]

Replacement piston wrist pin for FZ110S

This wrist pin is a direct replacement designed for the YS FZ110S engine series and carries the part number YSF7329. It links the piston to the small end of the connecting rod and is intended for model engine maintenance and rebuilds.

When servicing your FZ110S inspect piston and connecting rod for wear before fitting the wrist pin. Fit the pin so the piston runs true in the bore, ensure circlips or other retainers are correctly seated, and apply a light lubricant suitable for glow engines to ease initial motion during break-in.

As a wear item, the wrist pin affects piston stability and ring sealing; replacing a worn YSF7329 can reduce piston play and help restore consistent compression and running characteristics without changing the engine's tuned settings.