If you are missing a nozzle for your scooter you have come to the right place. It is very important to drive with the correct head nozzle on your scooter, as the wrong nozzle can damage your engine. The job of the nozzle is to control the gasoline supply to your engine. The amount of gasoline depends on the size of your nozzle, which is often between 30-200. Pay attention to your carburetor type, as some carburetors measure the size on a different scale than others.