YS Engine YSS2005 56SR Cylinder Liner Replacement Sleeve  [YSS2005]

Service sleeve for 56SR-series motors

The YS Engine YSS2005 Cylinder Liner 56SR #S2005 is supplied as a service replacement for RC glow engines. It forms the internal wear surface of the combustion chamber and is meant for engines identified by the 56SR label.

Functionally, the liner restores bore integrity and compression by replacing a worn or scored sleeve. When fitting, ensure the liner seats evenly and aligns axially in the engine case; small adjustments, lapping, or minor case work may be needed when original tolerances have altered after long service.

During reassembly, confirm ring and piston condition and fitment, use any required gaskets, and follow standard fuel and break-in procedures. This component is intended to maintain and renew the bore rather than to boost peak performance.

Fit this liner as part of routine overhaul work when bore wear is evident, and adhere to engine-specific assembly steps for reliable operation.