12-race AMA Outdoor Motocross Championship Series<br /><br /><br /><img src="http://ll.broadbandsports.com/images/34650_thumb.jpg" alt="Motocross Championship Series - 250 and 450 Class Races " title="Motocross Championship Series - 250 and 450 Class Races " width="150" height="90" alt="Motocross Championship Series - 250 and 450 Class Races "/>
