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

Precision low-throttle adjustment component

Designed as a spare for YS Engine carburettor assemblies, this low-speed needle handles idle mixture settings and shapes engine response at light throttle. The following text concentrates on fitment awareness, safe installation, and the needle's practical tuning function without asserting additional technical details.

Compatibility note: the product title denotes a YS Engine low speed needle intended specifically for YS Engine carburettor assemblies. Compatibility with other brands is not claimed.

Installation and handling:

• Remove the air cleaner or carb cover to reach the low-speed needle position.
• Unscrew the existing needle carefully, noting the starting turn count or seating so you can restore it if needed.
• Install the new needle in the same orientation at the factory baseline, and ensure the throttle linkage operates smoothly without binding.
• After fitment, conduct a cautious run-in and then make incremental tuning changes while monitoring idle and low-throttle reaction.

Tuning role:

• The low-speed needle manages fuel mixture during idle and small throttle openings, which affects smoothness and throttle response.
• Perform small adjustments followed by short test runs to avoid lean or rich conditions; begin from the original baseline.
• Replacement is recommended when wear, damage, or contamination reduces control at low throttle.