This is the third stage of the motorcycle - maturity.

After the 20th century, after 30 years,construction earthmover with the continuous progress of science and technology, motorcycle production and use of the suspension shock absorber system, mechanical ignition system, mechanical drum brakes, chain drive, so that the motorcycle has climbed to new stairs, motorcycles gradually mature, widely used in transportation, drive bulldozers competition and military aspects. This is the third stage of the motorcycle - maturity.