Speed motor bike
The Grands Prix Speed are a sporting discipline consistent motorcylcist in a speed race on a circuit.
In international competitions, organized by the FIM (International federation of Motorcycle racing), three categories exist: 125 cm, 250 cm and MotoGP.
Of category 125 cm, are accepted the motor bikes with one-cylinder engine and whose weights are limited to 80 kg.
Of category 250 cm, are accepted the motor bikes of two cylinders and whose weight is limited to 100 kg.
Of category MotoGP, are accepted the motor bikes of 800 cm to four times, from 3 to 6 cylinders and whose minimum weight depends on the number of cylinders. 990 cm four times replaced 500 cm two times in 2002 (although in theory 500 cm were accepted until 2006). The new regulation 2007 tiny room the cubic capacity to 800 cm and prohibits the use of other engines.
Historically, the Grand Prix speed motor bike, organized in championship of the World, began in 1949.
Certain categories disappeared:
- 350 cm in 1982
- 50 cm, replaced by the 80
- 80 cm (of 1984 to 1989)
- the motorcycle combinations
- 750 cm, which had only one short existence
- 500 cm, in 2007
- 990 cm, replaced by 800 cm in 2007
- Championships of the world speed
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