What are the two tubes under the motorcycle fuel tank?

[AvaFitz]

The tube at the bottom of the carburetor serves as both the carburetor's drain tube and the overflow tube. When the fuel level inside the carburetor is too high, gasoline will flow out through this tube. Below is additional information about the overflow tube: 1. Oil leakage reason: The main cause of oil leakage from the motorcycle carburetor overflow tube is the displacement of the float in the float chamber, which prevents the float needle valve from rising to its proper position and fully closing the fuel inlet. The continuous inflow of gasoline will then flow out through the overflow tube. 2. Float: The float is an object with an overall specific gravity lighter than gasoline, typically made of foam or hollow. Generally, simple adjustments can fix the issue, but if the float is damaged, it should be replaced if possible. If the float cannot be replaced, the entire carburetor must be replaced. 3. Working principle: Although motorcycle carburetors appear very complex, understanding some basic principles can help adjust the motorcycle to its optimal state. All carburetors operate under the basic principle of atmospheric pressure.