MotoUSA brings you the latest news and results on dirt bike racing. Get the scoop on dirt bike racing series like Supercross, Motocross and Off Road. Extreme Top Fuel Motorcycle Dirt Drag Shoot Out. I wonder if the ppl that ride these bikes r nervous before. Motocross is a form of off-road motorcycle racing held on enclosed off-road circuits. The sport . Supermoto uses motocross bikes converted for racing on tracks consisting three sections, flat dirt, dirt obstacles, and paved road. The bikes have special road- racing tires with grooved tread to grip both the pavement and dirt.
Dirt racing bike Video