In a motorcycle, the fuel typically goes into the fuel tank. The fuel tank is a container located on the motorcycle frame, usually positioned between the rider's seat and the handlebars. It is designed to store the fuel that powers the motorcycle's engine.
The fuel tank has an opening or fuel cap through which fuel is added. The cap is typically located on the top of the tank, and it can be opened to access the fuel filler neck. When adding fuel, it's important to use the appropriate type of fuel recommended by the motorcycle manufacturer (usually gasoline).
Inside the fuel tank, there is a fuel pump or fuel petcock (a valve) that controls the flow of fuel from the tank to the engine. The fuel pump, in modern motorcycles, is typically electric and is responsible for delivering fuel under pressure to the engine's fuel injectors. In older motorcycles with carburetors, a fuel petcock is used to manually control the flow of fuel to the engine.
From the fuel tank or the fuel pump/fuel petcock, the fuel is sent through fuel lines to the engine. In fuel-injected motorcycles, the fuel is injected directly into the engine's combustion chambers by fuel injectors. In carbureted motorcycles, the fuel is mixed with air in the carburetor before being delivered to the engine's cylinders.
Once the fuel reaches the engine, it is ignited by the spark plugs, and the combustion process produces power that drives the motorcycle's wheels and propels the motorcycle forward. Any unburned fuel or exhaust gases are expelled through the motorcycle's exhaust system.