Motorcycle is a kind of two-wheeled or three-wheeled vehicle driven by gasoline engine and controlled by handlebar, which is light, flexible and fast. Widely used in patrol, passenger and freight transportation, etc. It is also used as sports equipment. Generally speaking, motorcycles are divided into street cars, road racing cars, cross-country motorcycles, cruise cars, station wagons and so on. Modern motorcycle industry has introduced a large number of advanced technologies. For example, the FLHRC- 1 motorcycle launched by Harley-Davidson Company in 1998 adopted the world-class automobile engine technology-fuel injection device, which not only improved the power, but also met the environmental protection needs of contemporary society and became the forerunner of motorcycles in 2 1 century. The application of high and new technologies such as optical communication electronic control system, radar ranging automatic control system, electronic map navigation system and acoustic wave electronic silencing system in some concept motorcycles has made modern motorcycles more perfect and more powerful.