Replacement Piston YSS8106 for RC Engine 61ST2 - YS Engine  [YSS8106]

Spare piston for RC engine servicing

The YS Engine piston, model YSS8106, is listed as a service replacement linked to the 61ST2 reference in the title. It is intended for rebuilds or repairs where a direct piston change is necessary, and is offered as a technical spare rather than a performance upgrade.

The piston is vital for compression and combustion chamber sealing in nitro RC engines. Prior to fitting, inspect the bore and piston rings for wear or scoring that could affect sealing. Fit the piston with care to preserve ring seating and avoid contaminating the cylinder during assembly.

Service notes: employ proper engine workshop practices, assemble on a clean bench, and carry out a measured break-in or verification run after installation to confirm compression and smooth operation. Verify fitment of YSS8106 with your engine details for the 61ST2 reference before purchase.

A practical replacement piston for restoring engine compression and dependable running during maintenance or rebuilds.