Motorcycles are an easy, efficient and flexible means of transportation. Since the 1990s, motorcycles have developed rapidly in my country. Corresponding to it is the prosperity and prosperity of motorcycle parts and accessories industry. According to the function, motorcycle parts and accessories can be divided into the following major types: motorcycle engine assembly system, motorcycle transmission mechanism, motorcycle body mechanism, motorcycle electrical system, etc. Among them, motorcycle engine assembly system and electrical system integration are high-end products of motorcycle parts and accessories industry, and they are also the most profitable part of the market. Motorcycle parts and accessories products mainly include: motorcycle sidecars (or side buckets); motorcycle engines; motorcycle saddles, other parts and accessories. The manufacture of motorcycle parts and accessories refers to the manufacture of special parts and accessories for motorcycles. According to the National Economic Industry Classification and Code formulated by the National Bureau of Statistics, China classifies motorcycle parts and accessories manufacturing as motorcycle manufacturing (C375) in the transportation equipment manufacturing industry (National Bureau of Statistics code 37). The class code is C14380.