1973 FIM Motocross World Championship

Roger De Coster won his third consecutive 500cc world championship for Suzuki ahead of West German rider, Willy Bauer.

Suzuki's defense of the 500cc world championship was dealt a setback when, the FIM announced a new motorcycle minimum weight limit of 209 pounds just before the start of the season.

[2][3] Going into the final race of the season at Sint Anthonis, Holland, Bauer was still holding the points lead but, the Suzukis were showing improvement.

The Sint Anthonis track was composed of deep sand which robbed engines of power and increased fuel consumption.

Yamaha's new and innovative rear suspension with a single shock absorber made its debut at the third round in Belgium and was proven to be successful when Andersson won the overall victory.

[8] Competitors from nine different manufacturers placed in the top ten of the 250cc championship final standings, reflecting the thriving vitality of the sport of motocross.