350 cc Championship
| YEAR | PILOTS | MAKERS | ||||
| WINNER | SECOND | THIRD | WINNER | SECOND | THIRD | |
| 1949 | Freddie Frith (GB) (Velocette) | Reg Armstrong (IRL) (AJS) | Bob Foster (GB) (Velocette) | Velocette | AJS | Norton |
| 1950 | Bob Foster (GB) (Velocette) | Geoff Duke (GB) (Norton) | Leslie Graham (GB) (AJS) | Velocette | Norton | AJS |
| 1951 | Geoff Duke (GB) (Norton) | William Doran (GB) (AJS) | John Lockett (GB) (Norton) | Norton | AJS | Velocette |
| 1952 | Geoff Duke (GB) (Norton) | Reg Armstrong (IRL) (Norton) | Ray Amm (GB) (Norton) | Norton | AJS | DKW |
| 1953 | Fergus Anderson (GB) (Guzzi) | Enrico Lorenzetti (I) (Guzzi) | Ray Amm (GB) (Norton) | Guzzi | Norton | AJS |
| 1954 | Fergus Anderson (GB) (Guzzi) | Ray Amm (GB) (Norton) | Rod Coleman (NZ) (AJS) | |||
| 1955 | Bill Lomas (GB) (Guzzi) | Dickie Dale (GB) (Guzzi) | August Hobl (D) (DKW) | Guzzi | DKW | Norton |
| 1956 | Bill Lomas (GB) (Guzzi) | Dickie Dale (GB) (Guzzi) | August Hobl (D) (DKW) | Guzzi | DKW | Norton |
| 1957 | Keith Campbell (AUS) (Guzzi) | Libero Liberati (I) (Gilera) | Bob McIntyre (GB) (Gilera) | Gilera | Guzzi | Norton |
| 1958 | John Surtees (GB) (MV Agusta) | John Hartle (GB) (MV Agusta) | Geoff Duke (GB) (Norton) | MV Agusta | Norton | AJS |
| 1959 | John Surtees (GB) (MV Agusta) | John Hartle (GB) (MV Agusta) | Bob Brown (AUS) (Norton) | MV Agusta | Norton | AJS |
| 1960 | John Surtees (GB) (MV Agusta) | Gary Hocking (RHO) (MV Agusta) | John Hartle (GB) (Norton) | MV Agusta | Norton | Jawa |
| 1961 | Gary Hocking (RHO) (MV Agusta) | Franta Stastny (CZ) (Jawa) | Gustav Havel (CZ) (Jawa) | MV Agusta | Jawa | Norton |
| 1962 | Jim Redman (RHO) (Honda) | Tommy Robb (IRL) (Honda) | Mike Hailwood (GB) (MV Agusta) | Honda | MV Agusta | Jawa |
| 1963 | Jim Redman (RHO) (Honda) | Mike Hailwood (GB) (MV Agusta) | Luigi Taveri (CH) (Honda) | Honda | MV Agusta | Jawa |
| 1964 | Jim Redman (RHO) (Honda) | Bruce Beale (GB) (Honda) | Mike Duff (CDN) | Honda | ||
| 1965 | Jim Redman (RHO) (Honda) | Giacomo Agostini (I) (MV Agusta) | Mike Hailwood (GB) (MV Agusta) | Honda | MV Agusta | Jawa |
| 1966 | Mike Hailwood (GB) (Honda) | Giacomo Agostini (I) (MV Agusta) | Renzo Pasolini (I) (Aermacchi) | Honda | MV Agusta | Aermacchi |
| 1967 | Mike Hailwood /GB) (Honda) | Giacomo Agostini (I) (MV Agusta) | Ralph Bryans (IRL) (Honda) | Honda | MV Agusta | MZ |
| 1968 | Giacomo Agostini (I) (MV Agusta) | Renzo Pasolini (I) (Benelli) | Kel Carruthers (AUS) (Aermacchi) | MV Agusta | Benelli | Aermacchi |
| 1969 | Giacomo Agostini (I) (MV Agusta) | Silvio Grassetti (I) (Yamaha) | Giuseppe Visenzi (I) (Yamaha) | MV Agusta | Yamaha | MZ |
| 1970 | Giacomo Agostini (I) (MV Agusta) | Kel Carruthers (AUS) (Yamaha) | Renzo Pasolini (I) (Benelli) | MV Agusta | Yamaha | Benelli |
| 1971 | Giacomo Agostini (I) (MV Agusta) | Jarno Saarinen (SF) (Yamaha) | Ivan Carlsson (S) (Yamaha) | MV Agusta | Yamaha | |
| 1972 | Giacomo Agostini (I) (MV Agusta) | Jarno Saarinen (SF) (Yamaha) | Renzo Pasolini (I) (Aermacchi) | MV Agusta | Yamaha | Aermacchi |
| 1973 | Giacomo Agostini (I) (MV Agusta) | Tevo Lansivuori (SF) (Yamaha) | Phil Read (GB) (MV Agusta) | Yamaha | MV Agusta | |
| 1974 | Giacomo Agostini (I) (Yamaha) | Dieter Braun (D) (Yamaha) | Patrick Pons (F) (Yamaha) | Yamaha | Harley Davidson | Aermacchi |
| 1975 | Johnny Alberto Cecotto (YV) (Yamaha) | Giacomo Agostini (I) (Yamaha) | Penti Korhonen (SF) (Yamaha) | Yamaha | SMZ | Harley Davidson |
| 1976 | Walter Villa (I) (Harley Davidson) | Johnny Alberto Cecotto (YV) (Yamaha) | Chas Mortimer (GB) | Yamaha | Harley Davidson | Morbidelli |
| 1977 | Takazumi Katayama (J) (Yamaha) | Tom Herron (IRL) (Yamaha) | Jonnie Ekerold (ZA) (Yamaha) | Yamaha | Morbidelli | |
| 1978 | Kork Ballington (ZA) (Kawasaki) | Takazumi Katayama (J) (Yamaha) | Greg Hansford (AUS) (Kawasaki) | Kawasaki | Yamaha | |
| 1979 | Kork Ballington (ZA) (Kawasaki) | Oriol Fernandez (E) (Yamaha) | Greg Hansford (AUS) (Kawasaki) | Kawasaki | Yamaha | Suzuki |
| 1980 | Jonnie Ekerold (ZA) (Bimota) | Anton Mang (D) (Kawasaki) | Jean Francois Baldé (F) (Kawasaki) | Bimota | Kawasaki | Yamaha |
| 1981 | Anton Mang (D) (Kawasaki) | Jonnie Ekerold (ZA) (Bimota) | Jean Francois Baldé (F) (Kawasaki) | Kawasaki | Bimota | Yamaha |
| 1982 | Anton Mang (D) (Kawasaki) | Didier De Radigues (B) | Jean Francois Baldé (F) (Kawasaki) | Kawasaki | ELF | Yamaha |