How often should the pilot throttle be cleaned?

Suggestion: Clean the throttle every 20,000 kilometers. Function of throttle valve: 1. Throttle is a control valve that controls air to enter the engine. After the gas enters the intake pipe, it is mixed with gasoline to form a combustible mixture, so as to burn and do work. 2. The throttle valve is connected with the air filter and the engine block, which is called the throat of the automobile engine. If a four-stroke gasoline engine is considered, the function of the throttle valve is roughly as follows: 3. Throttle is one of the most important components in computer engine system. Its upper part is the air grid of the air filter, and its lower part is connected with the engine cylinder, which is the throat of the automobile engine.