YS Engine YSS1009 Piston Wrist Pin Retainer 50pcs Replacement for RC Piston Assemblies  [YSS1009]

Retention clip for RC piston wrist pins

The YS Engine YSS1009 piston wrist pin retainer is supplied as a 50pcs pack and is made to hold wrist pins securely inside RC piston assemblies for rebuilds and regular servicing.

Though small, this retainer plays a key role in preventing axial movement of the wrist pin under vibration in RC nitro engines, helping to avoid pin migration that can damage the piston or cylinder.

During replacement, inspect both piston and wrist pin for damage or scoring; replace any damaged components, use multiple retainers to keep ahead of service intervals, and confirm correct seating to prevent uneven wear.

Sold as a direct spare for YS Engine piston assemblies and usable in compatible RC nitro piston rebuilds, the part is intended for maintenance purposes rather than boosting engine output.