For professional Motocross, the biggest bike that is allowed to be raced is a 450 four-stroke. For local race purposes there is a Vet class that allows any size bike to be raced (usually up to 525 since that's the biggest motocross bike that KTM makes).
yes, dirt bikes are motorized
dirt bikes
Everybody that races dirt bikes "started" racing dirt bikes at some point.
dirt bikes in the past had less gears and power then dirt bikes have today
mostly ATVs but sometimes motor cycles but the big one is street bikes hope this helps
no dirt bikes arn't illegal
no there not dirt bike is better
The two main types of dirt bikes are motocross and trail bikes. Yamaha, Kawasaki, and Honda all make these types of dirt bikes.
dirt-biking is for dirt-bikes it can be either stunt or mud riding
Companies that manufacture stunt dirt bikes include Nitro Circus, Shine Ray, Big Minis, XMoto, and Summit Motors. These companies also produce the bikes used at the X Games.
There are a few dirt bikes that you can buy that are cheap. Some generic dirt bikes you can buy are 200 CC, Yamaha and you can have bikes shipped to you from China.
Yes Dirt Bikes Have Vin Numbers.