Suzuki TM400 1971
The TM400 was developed as a production motocrosser to participate in 500cc class motocross races including World GP. Giving priority to the maneuverability of the machine, its engine displacement was lowered to 396cc. In the World Motocross GP series held in the same year, Roger De Coster won the championship in the 500cc class riding the RN71 (367cc) factory machine. In total he won 5 world titles of the same class adding 4 more victories in 1972, 1973, 1975 and 1976.