61SH Replacement Piston Ring YSR6201 for RC Glow Engines - YS Engine  [YSR6201]

YSR6201 ring for 61SH engines

This piston ring is a direct replacement for 61SH-class model glow engines using the YSR6201 designation. Supplied as a single spare ring, it restores sealing where the original component shows wear or scoring.

Function overview: the ring re-establishes piston-to-cylinder contact to minimise blow-by, helping maintain compression for smoother running during break-in, routine upkeep, or tuning sessions.

Fitting tips: check piston and cylinder surfaces for scoring and confirm correct clearances before assembly. Use light assembly lubrication and verify free piston travel after installation to prevent binding. If the ring gap or seating seems wrong, inspect for debris or deformation and re-check fitment.