YS Engine YSF1553 Throttle Barrel (140) Replacement  [YSF1553]

Throttle bore part for model nitro carburettors

The YS Engine YSF1553 throttle barrel 140 is supplied as a replacement bore for YS Engine throttle assemblies. It guides the throttle slide and maintains the direct mechanical interface between the carburettor barrel and the throttle linkage.

Installation follows standard carburettor maintenance: remove the carburettor, open the throttle housing if needed, withdraw the old barrel and fit the new unit, ensuring the bore is clean and the barrel runs freely. Recheck throttle centring and full travel before operating the model.

During tuning the throttle barrel affects throttle feel and idle transition; include it in regular carburettor upkeep to sustain consistent response. Inspect for contamination or burrs and operate the throttle through its full range after fitting.