YS Engine YSS8106 Piston for 61ST2 RC Engines  [YSS8106]

Piston replacement for RC engines

This YS Engine piston is supplied as a replacement component identified by model YSS8106 and referenced to 61ST2 in the product name. It is intended as a direct spare for rebuilds or repairs where the original piston must be swapped out, and is presented as a service part rather than an aftermarket performance upgrade.

For hobbyists working on nitro RC engines, the piston is central to compression and combustion sealing. Inspect the cylinder bore and piston rings for scoring or wear that would compromise sealing before fitting. Fit the piston carefully, keeping ring gaps aligned and preventing debris from entering the bore during assembly.

Installation notes: follow standard engine service practice, work on a clean surface, and carry out a cautious break-in or inspection run after assembly to verify compression and smooth running. Confirm that the YSS8106 matches your engine reference 61ST2 prior to purchase.

A straightforward replacement piston for restoring compression and normal engine operation during routine RC engine maintenance.