Carburettor Throttle Barrel for 50ST Engines - YSS1025 by YS Engine  [YSS1025]

Carburettor throttle barrel details

This YS Engine YSS1025 throttle barrel is intended as a direct spare for carburettors matched to 50ST engines. It fits into the throttle bore where the slide or spindle travels and is supplied on its own without additional fittings.

The 50ST marker in the part title identifies likely compatibility; verify fit before committing to installation. The replacement restores concentric travel of the throttle slide and helps maintain consistent airflow through the carburettor throat.

Fitting advice: detach the carburettor from the model, inspect seals and O-rings, then slide the new barrel into the carburettor housing ensuring correct alignment and free movement of the throttle spindle. Do not force the barrel into place if resistance is found.

Effect on tuning: installing a correctly sized barrel can eliminate slide binding, stabilise idle speed and provide a steadier throttle response during break-in and routine servicing of nitro engines.