WORLD CHAMPIONS
125 Rider |
| 1949 | Nello Pagani | Italy | Mondial |
| 1950 | Bruno Ruffo | Italy | Mondial |
| 1951 | Carlo Ubbiali | Italy | Mondial |
| 1952 | Cecil Sandford | UK | MV Agusta |
| 1953 | Werner Haas | Germany | NSU |
| 1954 | Rupert Hollaus | Austria | NSU |
| 1955 | Carlo Ubbiali | Italy | MV Agusta |
| 1956 | Carlo Ubbiali | Italy | MV Agusta |
| 1957 | Tarquinio Provini | Italy | Mondial |
| 1958 | Carlo Ubbiali | Italy | MV Agusta |
| 1959 | Carlo Ubbiali | Italy | MV Agusta |
| 1960 | Carlo Ubbiali | Italy | MV Agusta |
| 1961 | Tom Phillis | Australia | Honda |
| 1962 | Luigi Taveri | Switzerland | Honda |
| 1963 | Hugh Anderson | New Zealand | Suzuki |
| 1964 | Luigi Taveri | Switzerland | Honda |
| 1965 | Hugh Anderson | New Zealand | Suzuki |
| 1966 | Luigi Taveri | Switzerland | Honda |
| 1967 | Bill Ivy | UK | Yamaha |
| 1968 | Phil Read | UK | Yamaha |
| 1969 | Dave Simmonds | UK | Kawasaki |
| 1970 | Dieter Braun | Germany | Suzuki |
| 1971 | Angel Nieto | Spain | Derbi |
| 1972 | Angel Nieto | Spain | Derbi |
| 1973 | Kent Andersson | Sweden | Yamaha |
| 1974 | Kent Andersson | Sweden | Yamaha |
| 1975 | Paolo Pileri | Italy | Morbidelli |
| 1976 | Pier Paolo Bianchi | Italy | Morbidelli |
| 1977 | Pier Paolo Bianchi | Italy | Morbidelli |
| 1978 | Eugênio Lazzarini | Italy | Morbidelli |
| 1979 | Angel Nieto | Spain | Minarelli |
| 1980 | Pier Paolo Bianchi | Italy | MBA |
| 1981 | Angel Nieto | Spain | Minarelli |
| 1982 | Angel Nieto | Spain | Garelli |
| 1983 | Angel Nieto | Spain | Garelli |
| 1984 | Angel Nieto | Spain | Garelli |
| 1985 | Fausto Gresini | Italy | Garelli |
| 1986 | Luca Cadalora | Italy | Garelli |
| 1987 | Fausto Gresini | Italy | Garelli |
| 1988 | Jorge Martinez | Spain | Derbi |
| 1989 | Alex Criville | Spain | JJ Cobas |
| 1990 | Loris Capirossi | Italy | Honda |
| 1991 | Loris Capirossi | Italy | Honda |
| 1992 | Alessandro Gramigni | Italy | Aprilia |
| 1993 | Dirk Raudis | Germany | Honda |
| 1994 | Kazuto Sakata | Japan | Aprilia |
| 1995 | Haruchika Aoki | Japan | Honda |
| 1996 | Haruchika Aoki | Japan | Honda |
| 1997 | Valentino Rossi | Italy | Aprilia |
| 1998 | Kazuto Sakata | Japan | Aprilia |
| 1999 | Emilio Alzamora | Spain | Honda |
| 2000 | Roberto Locatelli | Italy | Aprilia |
| 2001 | Manuel Poggiali | San Marino | Gilera |
| 2002 | Arnaud Vincent | France | Aprilia |
| 2003 | Daniel Pedrosa | Spain | Honda |
| 2004 | Andrea Dovisioso | Italy | Honda |
| 2005 | Thomas Lüthi | Switzerland | Honda |