Graves Yamaha's Ben Bostrom won an exciting AMA Supersport race at Fontana, taking the victory of Erion Honda's Jake Zemke by 0.079 seconds.
Bostrom, who has a Daytona victory to his credit, led Zemke going onto the banking the last time and held off the Honda man at the line.
Josh Herrin ran up front for much of the race but lost the leading duo in the final laps. He did not change tires during the red flag.
The race was stopped due to an ugly crash involving Martin Cardenas and Tommy Hayden.