Working principle and structure of motorcycle carburetor

The carburetor is actually a pipe with an adjustable plate called a throttle plate in the middle to control the air flow through the pipe. There is a constriction called venturi in the pipe, where a vacuum is formed. The constricted portion has a metering hole from which fuel can be sucked by vacuum.

Structure diagram:

Extended data:

Motorcycle carburetor looks very complicated, but as long as you master some principles, you can adjust the motorcycle to the best condition. All carburetors work under the basic principle of atmospheric pressure. Atmospheric pressure is a powerful force that exerts pressure on everything. Slightly different, but usually there is a pressure of 15 pounds per square inch.

This means that the atmospheric pressure is 0/5 pound per square inch/kloc. By changing the atmospheric pressure in the engine and carburetor, the pressure can be changed and fuel and air can flow through the carburetor.

References:

Baidu encyclopedia-carburetor