No, not all motorcycles have a fuel control valve. The presence of a fuel control valve depends on the specific design and type of the motorcycle.
Some motorcycles, particularly older models or those with carbureted engines, may have a fuel control valve, also known as a petcock or fuel tap. This valve allows the rider to manually control the flow of fuel from the gas tank to the engine. It typically has three positions: On, Off, and Reserve. The On position allows fuel to flow from the main tank, while Reserve provides access to a smaller reserve portion of the tank when the fuel level is low. The Off position completely shuts off the fuel flow.
On the other hand, many modern motorcycles, especially those with fuel-injected engines, do not have a fuel control valve. Fuel injection systems are designed to automatically regulate the fuel flow based on various engine parameters, eliminating the need for a manual control valve.
It's important to consult the specific motorcycle's manual or manufacturer's specifications to determine if it has a fuel control valve and how it operates.