YS Engine YSS2048 Carburettor High-Speed Needle 56SR for RC nitro engines  [YSS2048]

Needle for high-speed carburettor tuning

The YS Engine YSS2048 high speed needle is an aftermarket carburettor spare that lets you dial in high-speed fuel mixture for RC glow engines. It occupies the carburettor metering position to influence mid-to-high RPM behaviour during fine tuning.

Delivered as a single replacement component, installation requires access to the needle seat and routine hand tools used in RC engine maintenance. The hardened steel tip helps maintain consistent performance under repeated tuning sessions.

Impact on tuning

The high-speed needle sets fuel flow at higher throttle settings and is quite sensitive to small rotations. Make incremental changes and check the engine under load to find the best mixture and stable temperatures. This piece is intended to refine mixture, not to substitute for mechanical repairs.

Installation notes

• Remove the air filter to get clear access to the carburettor.
• Turn the needle slowly with the appropriate driver, noting the number of turns from your baseline setting.
• Once installed, run the engine carefully and verify mixture and operating temperature before normal use.