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

Throttle barrel retainer screw

This YS Engine YSS2026 part is an RC-scale throttle barrel retainer screw named in the product title to match 56SR throttle barrels. Its role is simple and focused: secure the throttle barrel against axial movement so the barrel maintains consistent rotation and alignment during idle and throttle transitions.

Compatibility is indicated by the model marking "56SR" in the name, so use this retainer screw where service or replacement parts specify a 56SR throttle barrel retainer. Do not assume fitment for unrelated carburettor or throttle assemblies unless the model code matches.

Installation is straightforward for hobby-level maintenance: remove the throttle barrel assembly, position the barrel correctly, run the retainer screw into its threaded hole until it holds the barrel without binding, then verify smooth rotation across the throttle range. Avoid overtightening that can bind the barrel or damage threads; check free movement after final seating.

In tuning and setup, this screw helps keep throttle response predictable by removing unwanted play that can affect idle stability and throttle modulation. It is a small replacement part intended for routine maintenance and does not alter carburettor calibration on its own.