List of Grand Prix motorcycle racing World Constructors champions
Year 500cc 350cc 250cc 125cc Sidecar
1949 AJS ( 1 ) Velocette ( 1 ) Moto Guzzi ( 1 ) Mondial ( 1 ) Norton ( 1 )
1950 Norton ( 1 ) Velocette ( 2 ) Benelli ( 1 ) Mondial ( 2 ) Norton ( 2 )
1951 Norton ( 2 ) Norton ( 1 ) Moto Guzzi ( 2 ) Mondial ( 3 ) Norton ( 3 )
1952 Gilera ( 1 ) Norton ( 2 ) Moto Guzzi ( 3 ) MV Agusta ( 1 ) Norton ( 4 )
1953 Gilera ( 2 ) Moto Guzzi ( 1 ) NSU ( 1 ) MV Agusta ( 2 ) Norton ( 5 )
1954 Gilera * Moto Guzzi * NSU * NSU * Norton *
1955 Gilera ( 3 ) Moto Guzzi ( 2 ) MV Agusta ( 1 ) MV Agusta ( 3 ) BMW ( 1 )
1956 MV Agusta ( 1 ) Moto Guzzi ( 3 ) MV Agusta ( 2 ) MV Agusta ( 4 ) BMW ( 2 )
1957 Gilera ( 4 ) Gilera ( 1 ) Mondial ( 1 ) Mondial ( 4 ) BMW ( 3 )
1958 MV Agusta ( 2 ) MV Agusta ( 1 ) MV Agusta ( 3 ) MV Agusta ( 5 ) BMW ( 4 )
1959 MV Agusta ( 3 ) MV Agusta ( 2 ) MV Agusta ( 4 ) MV Agusta ( 6 ) BMW ( 5 )
1960 MV Agusta ( 4 ) MV Agusta ( 3 ) MV Agusta ( 5 ) MV Agusta ( 7 ) BMW ( 6 )
1961 MV Agusta ( 5 ) MV Agusta ( 4 ) Honda ( 1 ) Honda ( 1 ) BMW ( 7 )
By year
Grand Prix motorcycle racing is the premier championship of motorcycle road racing, which has been divided into three classes: MotoGP, Moto2, and Moto3. Classes that have been discontinued include 500cc, 350cc, 250cc, 125cc, 80cc, 50cc and Sidecar. The Grand Prix Road-Racing World Championship was established in 1949 by the sport's governing body, the Fédération Internationale de Motocyclisme (FIM), and is the oldest motorsport World Championship. There were five classes when the championship started in 1949; 500cc, 350cc, 250cc, 125cc and sidecar (600cc). The 50cc class was introduced in 1962. Due to escalating costs that resulted in a number of manufacturers leaving the championship, the FIM limited the 50cc bikes to a single cylinder, the 125cc and 250cc bikes were limited to two cylinders and the 350cc and 500cc bikes were limited to four cylinders. The 350cc class was discontinued in 1982, two years later the 50cc class was replaced with an 80cc class, which was discontinued in 1989. The sidecar class left the series to form its own championship after 1996. In 2002, 990cc four stroke engined bikes replaced the 500cc bikes and the class was renamed as MotoGP. 600cc four-stroke bikes replaced the 250cc bikes in 2010, with the class rebranded as Moto2. Since 2012, the Moto3 class (250cc four-stroke one cylinder) replaced the 125cc class. The 750cc was never part of the Grand Prix motorcycle racing series.