NameSeasonsWorld ChampionshipsMotoGP Wins500cc Wins350cc WinsMoto2 Wins250cc WinsMoto3 Wins125cc Wins80cc Wins50cc WinsMotoE Wins P. J. Jacobsen00000000000 Olivier Jacque-, 1250cc - 0000700000 Quentin Jacquet-00000000000 Börje Jansson-00000103000 Jakub Jantulík00000000000 Raúl Jara-00000000000 Jean-Pierre Jeandat-00000000000 David Jefferies00000000000 Tony Jefferies-00010000000 Griff Jenkins -, 00000000000 Denis Jenkinson 00000000000 Steve Jenkner-00000010000 Syd Jensen-00000000000 Enrique Jerez-00000000000 Lothar John, -00000000000 Mike Jones, 00000000000 Paul Jordan-00000000000 Serge Julin-, -00000000000 Károly Juhász-00000000000