7. Norton: 21 Race Wins

121114-top-11-gp-manufacturers-07-geoff-duke-norton-2

AJS won the inaugural 500cc Grand Prix Championship, but Norton is recognized as winning the first official 500cc Grand Prix race at the Isle of Man with Harold Daniell at the controls. It would be the legendary Geoff Duke (pictured) who would give Norton its first and only Grand Prix Rider Championship in 1951. Duke was responsible for eight of Norton’s 21 GP race wins, the first being in 1949 and the last in 1958 after many years aboard Gilera.