YS Engine YSS8132 61ST-2 Low-Speed Needle for RC Carburettors  [YSS8132]

Fine adjustment low-speed needle for carburettors

This replacement low-speed needle is made as a spare part for YS Engine carburettor assemblies. The component is used to set idle mixture and refine engine response at light throttle; the following notes cover compatibility awareness, installation pointers, and practical tuning guidance without adding extra specifications.

Compatibility note: the name indicates a YS Engine low speed needle intended as a direct replacement for YS Engine carburettor assemblies. No other chassis or brand compatibility is claimed here.

Installation and handling:

• Remove the air filter or cover to access the low-speed needle on the carburettor.
• Carefully unscrew the current low-speed needle, recording the baseline turns or seating position so you can revert if needed.
• Fit the replacement needle in the same orientation and set it to the factory baseline before making fine tuning changes, ensuring the throttle moves freely without binding.
• After installation, run the engine under controlled conditions and recheck idle and low-throttle response, making small incremental adjustments while observing behavior.

Tuning role:

• The low-speed needle regulates fuel mixture at idle and during small throttle openings, affecting smoothness and transition response.
• Make small changes and perform test runs to avoid running too lean or too rich; begin from the original baseline setting.
• Replace the needle if wear, damage, or clogging compromises mixture control at low throttle.