you go to WWW.addictinggames.com
1762
1902
1947
No, acutally your supposed to start when your small but if you want to do motocross get a 250 2 stroke or a 450 4 stroke and compete in National races and get sponsored.
The AMA was formed in 1924 but it wasn't until 1969 before the AMA ran its first professional motocross race.
there are many here are some: supercross arena cross motocross freestyle motocross indoor motocross outdoor motocross
Arthur Sparks did not start motocross; the sport's origins can be traced back to the 1920s and 1930s in the United Kingdom with events like scrambles and trials. Key figures in its development include the British Motorcycle Association and various motorcycle clubs. While Sparks may have been involved in motocross or contributed to its popularity, he is not credited with its inception.
Motocross, Supercross, Arenacross, Freestyle Motocross, Supermoto
Motocross, Supercross, Arenacross, Freestyle Motocross, Supermoto
motocross tracks
A cr250 is a motocross bike
Many people credit Jeremy McGrath the great Supercross racer with the emergence of freestyle motocross. McGrath's bmx trick ("Nac-Nac") performed on a motorcycle was the first formerly named trick to be performed during a motocross race before freestyle motocross existed as anything more than a grass roots effort during the early to mid 1990's.