The A-M-A Motorcycle weekend in Knoxville gets underway tonight at the Knoxville Raceway with a vintage motorcycle show. Tomorrow is the A-M-A Grand Nationals with the Pro Grand National Twins class and the Pro Singles. Knoxville Raceway Director of Sales and Marketing Brian Stickel says the two days offer fans a chance to see not just motorcycle racing. Tomorrow gets underway with a motorcycle rodeo at noon at the raceway. On track activities start with practice and time trials at 3:30, while racing gets underway at 7:30.