YS Engine YSG1052 Throttle Barrel Sleeve for YS FZ70S Carburettor  [YSG1052]

YS FZ70S replacement throttle sleeve

This replacement barrel sleeve is produced to restore the internal bore of YS FZ70S carburettors that have become scored or worn. Renewing the sliding surface helps bring back reliable idle characteristics and predictable throttle response in glow engines.

Fit and role: the sleeve forms the sliding bore for the throttle slide; wear here commonly leads to idle instability and inconsistent throttle action, so replacement is a routine maintenance step for restored drivability.

Installation notes: sold as the barrel component only for fitting into the carburettor throat. Installation assumes familiarity with small engine servicing and carburettor rebuild techniques; the unit is supplied as an RC spare part.