After the motorcycle is ignited, the fuel filler door cannot be moved. Check the air filter, carburetor and exhaust pipe. First look at whether the filter, carburetor and exhaust pipe are blocked. If these three reasons are ruled out, then check whether the oil is bad or the clutch slips, whether the valve rocker arm and camshaft are worn to cause insufficient intake and exhaust, and whether the brakes are too tight.
Motorcycle is a kind of two-wheeled or three-wheeled vehicle driven by gasoline engine and controlled by handlebars. It is light, flexible and fast, and is widely used in patrol, passenger and cargo transportation and so on.