Traditional Culture Encyclopedia - The 24 Solar Terms - Where is the speed-limiting plastic pipe for the throttle of motorcycle carburetor?

Where is the speed-limiting plastic pipe for the throttle of motorcycle carburetor?

There should be two pipes coming down from the tank. One pipe has a plastic white gasoline tank with a negative fuel tank inside. The pipe is connected to the lower left corner of the carburetor.

2. The other pipe has a fork pipe, one end of which is connected to the right interface of the carburetor, and the other end is connected to the well in front of the carburetor.