Yellow flag: Indicates danger ahead on or nearly the track. It must shown waved on marshal posts before the danger. Riders must slow down and be prepared to stop. Overtaking is forbidden up until the point when the green flag is shown, unless it is a much slower rider.
White flag: There is a slow moving car, ambulance or similar vehicle on the track. It is forbidden for a rider to overtake another rider during the display of the white flag, unless it is a much slower rider and until he passed the vehicle.
Yellow and Red Striped flag: Oil, water, gravel or another substance is affecting the adhesion of the track.
Red flag: Indicates that the race or practice is being interrupted. Riders must return slowly to the pits.
Blue flag: shown waved to a slower rider who is about to be overtaken by a faster rider. The slower rider may not hinder the faster rider. The rider must keep his line and slow down gradually to allow the faster rider to pass him.
Black flag (with number): The rider with this number must stop at the pits at the end of the current lap and cannot restart.
Black flag with orange disk (with number): It informs the rider whose motorcycle number is displayed that his motorcycle has mechanical problems likely to endanger himself or others, that must immediately leave the track on a safe place.
Chequered Black / white flag: Must be shown waved at the finish line on track level and indicates the finish of a race or practice session.