YS Engine YSF1553 140 Throttle Barrel Spare Part  [YSF1553]

Precision throttle barrel for RC nitro setups

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

Installation is typical for carburettor servicing: remove the carburettor from the model, disassemble the throttle housing where necessary, extract the old barrel and press the new barrel into position. Ensure the bore is clean and the barrel operates smoothly. Confirm throttle centring and full travel before use.

When adjusting the carburettor, this barrel has an effect on throttle feel and the idle-to-throttle transition; include it in maintenance and tuning to keep throttle response consistent. Check for any contaminants or damage and cycle the throttle through its range after fitting.