YS Engine YSS2026 56SR Throttle Barrel Retainer Screw for RC  [YSS2026]

Purpose and fit

The YS Engine YSS2026 retainer is a small but essential part for 56SR throttle barrels, designed to hold the barrel against forward and rearward play so rotation stays consistent during idle and throttle changes.

Compatibility is determined by the 56SR marking in the name. Use this screw where the service manual or replacement parts list specifies a 56SR throttle barrel retainer. It is not guaranteed to fit unrelated carburettor assemblies.

Installation involves removing the barrel, aligning it to the correct position, and threading the retainer screw until it secures the barrel without stopping rotation. Inspect the barrel for free, smooth travel after final seating and avoid excessive torque to protect threads.

When tuning, the retainer reduces unpredictable throttle movement caused by loose barrels, helping maintain steady idle and throttle control. It is intended as a maintenance part and does not directly retune the carburettor.