YS Engine YSS1009 50pcs Wrist Pin Retainers for RC Engine Piston Rebuilds  [YSS1009]

Piston wrist pin retention clip

This YS Engine YSS1009 piston wrist pin retainer is supplied in a 50pcs pack as a replacement item to hold wrist pins inside piston assemblies during rebuilds and scheduled maintenance.

As a small but essential item, the retainer prevents undue axial displacement of the wrist pin caused by vibration in RC nitro engines, reducing the risk of pin slippage that can lead to piston damage.

Replace retainers at the first sign of wear, inspect pistons and pins for scoring or deformation, maintain a stock of spare pieces to match service intervals, and ensure the retainer is fully seated to avoid irregular pin movement.

Designed to serve as a direct spare for YS Engine piston assemblies and for compatible RC nitro engine piston rebuilds, this part is intended for maintenance tasks rather than performance enhancement.