YS Engine YSS2048 High Speed Needle 56SR, carburettor high-speed needle for RC engines  [YSS2048]

High-speed carburettor needle

This YS Engine YSS2048 high speed needle is an RC-scale carburettor spare intended for fine adjustment of the engine's high-speed fuel mixture. It serves as the adjustable metering point within a glow engine carburettor and is used to refine performance in mid-to-high RPM ranges during tuning sessions.

The part is presented as a single component for replacement or spare use; fitting requires access to the carburettor needle seat and standard hand tools typical in RC engine maintenance. The needle's tip material and finish are chosen to resist wear from repeated needle changes and throttle tuning.

Role in tuning

When tuning a nitro RC engine, the high-speed needle controls fuel flow at higher throttle openings. Small turns change mixture richness noticeably, so use incremental adjustments and listen for consistent throttle response and temperature stability. This needle is for precision tuning rather than coarse repairs.

Installation notes

• Remove the air filter to access the carburettor area.
• Turn the needle gently with the appropriate driver, counting turns from the baseline setting.
• After replacement, run the engine under controlled conditions and re-check mixture and temperature.