YS Engine YSS2025 56SR Throttle Barrel Replacement  [YSS2025]

Replacement Throttle Barrel Details

This part is an RC throttle barrel supplied as a direct replacement that corresponds to the 56SR marking in the product title. It functions as a wear item within the throttle linkage and is supplied singularly for hobby RC engine use.

Purpose and role: fitted into the carburetor throat, the barrel controls the throttle lever travel and helps maintain steady idle and predictable throttle movement; replacing a worn barrel brings back consistent lever action on 56SR-class engines.

Installation notes: competent model builders will typically remove the throttle housing to swap the barrel, taking care to align the piece in the bore and ensure the linkage remains centred. After refitment, inspect the full travel and make any small linkage adjustments before firing the engine.

Tuning considerations: this replacement is part of routine servicing rather than a tuning modification, though renewing a worn barrel can sharpen throttle response and make tuning results more repeatable; perform bench and running checks to confirm behavior.