YS Engine YSF1553 Throttle Barrel Replacement 140  [YSF1553]

Carburettor bore replacement for nitro models

This YS Engine YSF1553 throttle barrel 140 is an aftermarket replacement part intended for YS Engine throttle assemblies. It acts as the bore that controls the throttle slide and secures the mechanical interface between the carburettor barrel and throttle linkage.

To fit, perform routine carburettor servicing: remove the carburettor, free the throttle housing as needed, withdraw the old barrel and insert the new barrel, ensuring cleanliness and smooth movement. Reconfirm throttle centring and full travel before returning the model to operation.

In setup and tuning the throttle barrel plays a role in throttle feel and idle transitions; replace it as part of normal maintenance to retain consistent response. Look for burrs or debris and run the throttle through its full travel after installation.