GEICO Honda's Jeremy Martin managed to walk away from this crash in San Diego. He would go on to race in the night show and finish seventh.
Tom McCormack has announced his retirement from off-road racing following a string of serious injuries.
Brett Metcalfe has signed up with the MEGA Bulk Fuels Monster Energy Kawasaki Racing Team and will take on the second half of the 2017 MX Nationals series with his factory Kawasaki KX450F.
Watch how Monster Energy Kawasaki rider Eli Tomac carves up the competition at the steep Glen Helen Raceway after two bad starts at the FIM MXGP of The USA.