Knee injuries. Knee injuries are the most common accidents ever on any kind of dirt bike. They are the four major ligaments -ACL,MCL,LCL, and PCL. Dirt bike race will be spent in a position where the knees are bent. You can find this kind of imformation at www.ctikneebraces.co.uk.
Collarbone injuries. If you hit your collarbone hard or hit it bad you can fracture it or you can brake it. Collarbones are another top injuries.