YS Engine YSS2025 Throttle Barrel 56SR replacement part  [YSS2025]

Throttle Barrel Replacement

This is a RC-scale throttle barrel intended as a direct replacement part matching the 56SR designation in the product name. It serves as a wearable component in the throttle linkage assembly and is supplied as a single replacement piece for hobby-grade RC engines.

Purpose and role: the barrel locates inside the carburetor/throttle assembly and guides throttle movement, so replacing a worn barrel restores smoother lever action and consistent idle and throttle response on the affected 56SR-class RC engine.

Installation notes: removal and fitment are typically straightforward for experienced model technicians, requiring careful access to the throttle housing, alignment of the barrel in the bore, and verification of unrestricted stroke and proper centring of the throttle linkage. After fitment, confirm full travel and adjust the linkage as needed before running the engine.

Tuning considerations: swapping the throttle barrel is a maintenance step rather than a tuning change, but it can affect throttle feel and responsiveness; check idle, mid-throttle and full-throttle response during bench testing and on-track checks to ensure predictable operation.