RC Needle Socket O-Ring 56SR Compatible Replacement - YS Engine YSS2050  [YSS2050]

Needle socket sealing solution for RC engines

This YS Engine YSS2050 high speed needle socket O-ring is a small replacement item intended for RC-scale needle sockets and valve fittings. It provides a sealing surface that keeps needle-valve seating consistent and helps prevent fuel or pressure leaks in needle assemblies used on model engines.

Fitting is simple: extract the old O-ring, confirm the socket bore is free of debris, apply a light lubricant if desired, and position the new O-ring evenly in the groove before reassembling the needle-valve. The task requires only basic hobby tools common to RC maintenance.

In tuning scenarios the O-ring allows fine needle movement while holding a secure seal. Replace worn or deformed rings during routine service to keep needle response steady and predictable.