YS Engine YSS1009 Piston Wrist Pin Retainer Pack 50pcs for RC Pistons  [YSS1009]

Wrist pin retention part for RC pistons

The YS Engine YSS1009 piston wrist pin retainer is provided in a 50pcs pack and is manufactured to secure wrist pins inside RC piston assemblies for rebuild and service work.

Although small, the retainer is vital in controlling axial movement of the wrist pin under vibration from nitro engines, helping to prevent pin migration that can affect piston integrity.

On replacement, inspect for scoring or distortion of piston and pin components and replace any damaged parts; keep a stock of retainers to match maintenance cycles and confirm correct seating before running the engine.

Offered as a direct spare for YS Engine piston assemblies and suitable for compatible RC nitro engine piston rebuilds, this item is intended for maintenance rather than as a tuning upgrade.