658900 Composite Carburetor Venturi – Set

Composite carburetor venturi set for FX engines. Includes 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0 and 8.5mm carburetor venturis.

The carburetor venturi adjusts the airflow that is allowed into the engine. By changing the size of the venturi, you can fine tune the power delivery and run time of the engine. A larger venturi will increase top end power, but at the expense of run time. A smaller venturi will improve bottom end throttle response, and improve run time.