AMA XTRM Supermoto Championship

Supermoto racing is the newest form of motorcycle racing, a hybrid form of the sport combining road racing and motocross. The bikes utilized are modified motocross machines, using slick tires and bigger brakes with a revised suspension and lower center of gravity.

The course customarily consists of a combination of paved road course combined with dirt and/or metal jumps. At Miller Motorsports Park, the state-of-the-art, 0.9-mile paved Miller Kart Track has dirt jump sections at either end, with a metal jump incorporated into the layout.

The AMA XTRM Supermoto Championship consists of three classes. The Supermoto class is for four-stroke, single-cylinder motorcycles with displacement up to 450cc. The Supermoto Unlimited class features two- or four-stroke single-cylinder motorcycles displacing 490cc and more, or 350cc-450cc four-stroke twin-cylinder engines. The Supermoto Lites class utilizes 200-250cc four-stroke single-cylinder engines.

This weekend will be the fourth round of the six-race 2008 season, and practice, heats and features races will all take place on Sunday, September 7.