YS Engine YSS1030 Needle Socket O-Ring 50pcs set for RC needle valve seals  [YSS1030]

Needle socket o-ring set

This YS Engine YSS1030 kit supplies rubber o-rings intended for needle socket sealing in RC-scale engine needle assemblies. The set contains 50 pcs, offering a ready stock of replacement seals for routine maintenance and minor repairs.

O-rings prevent fuel leakage at the needle seat and help maintain a consistent needle-to-seat fit, which supports stable idle and mid-range mixture behavior during tuning. Because sizes vary across fittings, confirm fit before final assembly and replace worn rings as part of regular engine upkeep.

Installation is straightforward: remove the carburettor needle assembly, slide off the old o-ring, position the new ring on the needle socket, and reassemble. Inspect the seat and needle for damage and replace parts if the o-ring cannot form a proper seal.