YS Engine YSR6201 Piston Ring 61SH replacement piston ring for RC model engines  [YSR6201]

YSR6201 piston ring for 61SH

This is an RC-scale piston ring intended as a direct replacement for 61SH-class model engines using the YSR6201 part code. The ring is supplied as a single replacement component to restore sealing performance where the original ring shows wear or scoring.

Practical role: the ring helps re-establish piston-to-cylinder contact and minimise blow-by in model glow engines, supporting consistent compression and smoother running during break-in, routine maintenance, or tuning sessions.

Installation notes: inspect piston and cylinder for scoring and correct clearances before fitting, use light lubrication for initial assembly, and verify free piston travel after installation to avoid binding. If ring end gap or fitment feels abnormal, re-check parts for debris or deformation.