Motorcycles change

9O's early 19th century to the 20th century, the early motorcycle due to the time taken by new inventions and new technologies, such as inflatable rubber tires, ball bearings, clutch and transmission, front suspension motorcycle engineering shock absorber system, spring seat, etc., which makes the motorcycle car began to have practical value, in the factory production, becomes a commodity, which is the second generation of motorcycles, known as commodities on behalf of the motorcycle. As 1912, the United States produced X -8A Harry single-cylinder motorcycle. Had not yet resolved transmission and drive system, but with a large belt drive pulley attached to the rear wheel, the brake by pulling the handle brake shoes to brake. At that time it did not solve the problem after the shock front shock absorbers have a simple shock collar device attached to the fork on. After the 20th century, after the 1930s, with advances in science and technology, motorcycle production also uses a suspension system to avoid condensation shock, mechanical ignition triumph cub motorcycle system, mechanical drum brakes, chain drive and so on. Make motorcycle again climbed to a new level, motorcycles gradually matured, widely used in transportation, competition and military aspects. This is the third phase of motorcycle - the mature stage. 1936, the United States has been able to create a Harley motorcycle high level. The car uses 1000mL, OHV, 27.93kW V-twin engine, a top speed of 150km / h.