How to control the throttle size of motorcycle carburetor

The function of carburetor is to mix air and gasoline into a mixture of 14.7: 1. Too thick and too thin will affect the work of the engine. The carburetor of ordinary motorcycle is controlled by a cable and equipped with an oil needle. When idling, the throttle valve is closed at the bottom, the idle hole provides gasoline, and the mixer screw provides air, which is 14.7: 1. When the throttle valve is pulled up, the air entering the engine increases, and at the same time, the gasoline inhaled from the main quantity increases after the oil needle is pulled up, which is mixed with the entered air and inhaled into the engine, so that the speed is increased.

The vacuum vaporizer is a bit complicated. The cable only controls the throttle valve in front of the throttle valve and only controls the air intake. The throttle valve is controlled by the upper rubber bag and spring. The plastic bag with large negative pressure (large throttle) wants to pull up the throttle, otherwise it will be pressed by the internal spring and return to the idle state.