The 1975 AMA 500cc National Championship Series will go down in the history of motocross as one of the most exciting and controversial in the sport’s history. With only five races in the series that year, there was little room for error. It would all come down to the last race in New Orleans on a hot, humid day in September 1975. Any one of six professional riders had a chance at winning the #1 plate that day...and the cameras were rolling. A young filmmaker named Charles Bush decided to follow the series that year with his crew to make a documentary film about motocross.