YS Engine YSS7103 Cylinder Head Gasket for 61ST Series  [YSS7103]

Cylinder head gasket for 61ST

This YS Engine YSS7103 cylinder head gasket is an RC-scale replacement part intended for use with 61ST-series model engines. It serves as a sealing interface between the cylinder head and sleeve to maintain compression and prevent blow-by during operation.

Use this gasket when performing head removal, head resurfacing checks, or when compression loss is suspected. Inspect mating surfaces for flatness and debris before installing a new gasket to ensure proper sealing and consistent engine performance.

Installation notes: clean the head and sleeve sealing faces, position the gasket evenly, and tighten the head bolts to the engine manufacturer's recommended torque in a crisscross pattern to avoid distortion. The gasket's role in tuning is primarily sealing reliability that supports repeatable compression and consistent warm-up behavior during jetting adjustments.