Is there any direct connection between motorcycle throttle and throttle?

There is no direct connection between motorcycle throttle and throttle.

Motorcycle throttle and throttle are both parts of carburetor, but they have different functions. The air door is mainly used to start the car when it is cold. After the air door is opened, the carburetor will provide the engine with a combustible mixture with large fuel supply and rich mixture, which is beneficial to the smooth start of the motorcycle during cold start. After closing the throttle, the fuel supply and mixture of carburetor return to normal. Throttle is used to control the amount of air entering carburetor, thus controlling the size of motorcycle throttle. The output power and speed of the engine can be controlled by adjusting the throttle opening. So although they are all parts of carburetor, there is no direct connection between throttle and throttle.