Well, if you want and old bike, Honda is the best, but as the bikes got newer, Kawasaki, Suzuki and Yamaha have caught up but i think a Honda or Kawasaki is the best
Brand wise, it is KTM. The make a wide varity of dirt bikes in both two and four strokes. They have everything from kid's bikes to enduro bikes to MX bike. They are by far the best.
husqvarna
yes, dirt bikes are motorized
fdk
heres the best one. Yamaha
I personally think the dirt bikes with the wider wheels are the best
dirt bikes
Everybody that races dirt bikes "started" racing dirt bikes at some point.
Here is a site you can find parts you need for your wildfire Dirt bikes ATVs & Scooterswww.wildfiremotors.com/index.php?option=com_content&task=view&id=24&Itemid=67
dirt bikes in the past had less gears and power then dirt bikes have today
any thing fox racing
no dirt bikes arn't illegal