THROTTLE

The device that controls the vacuum created in the venturi of the carburetor . The greater the vacuum, the richer the fuel-air mixture . The throttle enables the engine to run on a richer mixture and produce more power for high-speed driving. It consists of a throttle arm , located on the outside of the carburetor and connected to the gas pedal (or throttle twist grip on a motorcycle), which in turn activates a throttle butterfly valve at the base of the carburetor barrel , where it joins the intake manifold .