By Billy Ursic
We just received word from Team Yamaha's Broc Hepler that he suffered a broken arm while practicing near Beaumont in California and will miss the start of the 2008 AMA Toyota Motocross Championship. Hepler, who missed a majority of the Western Regional Lites Supercross series with a broken hand, was slated to move up and contest the AMA Motocross class on a 2008 YZ450F, the same bike Grant Langston used to win the 2007 AMA Motocross championship. There's no word yet on when Hepler will be healthy and able to return to racing. Stay tuned to Racer X Online as we hear more on this breaking development.