Throttle Barrel YS Engine YSS5121 for Linkage Replacement  [YSS5121]

Carburettor sleeve replacement

Presented as an RC-scale spare, this throttle barrel is intended for use inside a carburettor or throttle housing on model engines. It operates as the rotating sleeve that controls airflow and sets throttle position for compatible engine configurations.

The focus here is practical fit and operation rather than assured compatibility across all engines; confirm measurements and part references with your supplier before fitting. Typical installation steps include removing the carburettor housing, seating the barrel accurately in the bore, and checking for smooth rotation through the throttle range. Keep lubrication and clearances in line with the engine manufacturer's instructions.

When tuning, note that the barrel can influence idle stability and throttle response by affecting airflow metering and linkage geometry. After replacement, inspect linkage alignment and return springs. For maintenance, watch for wear where the barrel bears on the carburettor and replace if scoring or excessive play appears.