List of Grand Prix motorcycle racing World Constructors champions
Constructor Moto3 / 125cc Total
Honda 19 71
Yamaha 4 47
MV Agusta 7 38
Aprilia 10 19
BMW 19
Suzuki 3 15
Norton 9
Kawasaki 1 9
Derbi 4 9
Krauser 9
Kalex 7
Kreidler 7
Moto Guzzi 6
Gilera 5
Mondial 4 5
KTM 5 5
Garelli 4 5
Minarelli 4 4
Suter 3
Morbidelli 3 3
By constructor
1954 titles not counted
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.