2010年5月6日星期四

konw about china motocross

During the early 1980s, Japanese factories presided over a technology boom in motocross. The typical two-stroke air-cooled, twin-shock rear suspension machines gave way to machines that were water-cooled and fitted with monoshock rear suspension. By the 1990s, increasingly stringent environmental laws in California forced manufacturers to develop environmentally friendly four-stroke technology.
At the turn of the century, all the major manufacturers have begun competing with four-stroke machines. European firms also experienced a resurgence with Husqvarna, Husaberg and KTM winning world championships with four-stroke machinery.
The sport evolved with sub-disciplines such as stadium events known as supercross and arenacross held in indoor arenas. Freestyle motocross (FMX) events where riders are judged on their jumping and aerial acrobatic skills have gained popularity, as well as supermoto, where motocross machines race on both tarmac and off road. Vintage motocross events have also become popular with riders competing on bikes usually pre-dating the 1975 model year.
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