YS Engine YSS2050 High Speed Needle Socket O-Ring 56SR - Replacement for RC Needle Sockets  [YSS2050]

Compact sealing O-ring for high-speed needle sockets

This YS Engine YSS2050 high speed needle socket O-ring is a compact replacement part intended for RC-scale needle sockets and valve fittings. It acts as a sealing element to maintain proper needle-valve seating and to stop fuel or pressure leaks in needle assemblies used on model engines.

Installation is straightforward: remove the worn O-ring from the needle socket, inspect and clean the socket bore of any debris, lightly lubricate the new O-ring if preferred, and press it evenly into the groove before reassembling the needle-valve. No special tools are required beyond the basic disassembly tools commonly used in RC maintenance.

During tuning the O-ring helps preserve a consistent seal while allowing fine needle adjustments. Replace flattened or hardened rings as part of regular service to keep needle response predictable during setup and run sessions.