Mini RoadRacing is the sport of racing motorcycles on paved closed course circuits or paved lots to a maximum of 1,600 metres in length, including go-kart tracks and indoor arenas.  Currently, the AMRA allows sport bikes under 400cc and dirt-style bikes with smooth tires up to 150cc to ride on the track at Test & Tune (practice) evenings.  On an AMRA race day, there are classes for a wide variety of bikes and riders, including Supermoto.