| Grand Prix: | Czechoslovak |
| Flag: | Czechoslovakia |
| Official Name: | Grand Prix ČSSR[1] [2] [3] |
| Location: | Brno Circuit |
| Course Mi: | 6.785 |
| Course Km: | 10.920 |
| Race No: | 11 |
| Season No: | 12 |
| Date: | 4 August |
| Year: | 1975 |
| Pole Rider 500: | Teuvo Länsivuori |
| Pole Rider 500 Country: | FIN |
| Pole Time 500: | 3:37.400 |
| Fast Rider 500: | Teuvo Länsivuori |
| Fast Rider 500 Country: | FIN |
| Fast Time 500: | 3:41.500 |
| First Rider 500: | Phil Read |
| First Rider 500 Country: | GBR |
| Second Rider 500: | Giacomo Agostini |
| Second Rider 500 Country: | ITA |
| Third Rider 500: | Alex George |
| Third Rider 500 Country: | GBR |
| Pole Rider 350: | Johnny Cecotto |
| Pole Rider 350 Country: | VEN |
| Pole Rider 350 Country Flag Suffix: | 1954 |
| Pole Time 350: | 3:45.400 |
| Fast Rider 350: | Víctor Palomo |
| Fast Rider 350 Country: | ESP |
| Fast Rider 350 Country Flag Suffix: | 1945 |
| Fast Time 350: | 3:47.100 |
| First Rider 350: | Otello Buscherini |
| First Rider 350 Country: | ITA |
| Second Rider 350: | Olivier Chevallier |
| Second Rider 350 Country: | FRA |
| Third Rider 350: | Víctor Palomo |
| Third Rider 350 Country: | SPA |
| Third Rider 350 Country Flag Suffix: | 1945 |
| Pole Rider 250: | Michel Rougerie |
| Pole Rider 250 Country: | FRA |
| Pole Time 250: | 3:54.500 |
| Fast Rider 250: | Otello Buscherini |
| Fast Rider 250 Country: | ITA |
| Fast Time 250: | 3:49.200 |
| First Rider 250: | Michel Rougerie |
| First Rider 250 Country: | FRA |
| Second Rider 250: | Otello Buscherini |
| Second Rider 250 Country: | ITA |
| Third Rider 250: | Dieter Braun |
| Third Rider 250 Country: | BRD |
| Pole Rider 125: | Paolo Pileri |
| Pole Rider 125 Country: | ITA |
| Pole Time 125: | 4:13.500 |
| Fast Rider 125: | Paolo Pileri |
| Fast Rider 125 Country: | ITA |
| Fast Time 125: | 4:18.200 |
| First Rider 125: | Leif Gustafsson |
| First Rider 125 Country: | SWE |
| Second Rider 125: | Kent Andersson |
| Second Rider 125 Country: | SWE |
| Third Rider 125: | Eugenio Lazzarini |
| Third Rider 125 Country: | ITA |
| Pole Rider 50: | None |
| Fast Rider 50: | None |
| First Rider 50: | None |
| Second Rider 50: | None |
| Third Rider 50: | None |
The 1975 Czechoslovak motorcycle Grand Prix was the eleventh round of the 1975 Grand Prix motorcycle racing season. It took place on the weekend of 22–24 August 1975 at the Brno Circuit.
| Pos. | Rider | Team | Manufacturer | Time/Retired | Points | ||||
|---|---|---|---|---|---|---|---|---|---|
| 1 |  Phil Read | MV Agusta | MV Agusta | 1:04'23.900 | 15 | ||||
| 2 |  Giacomo Agostini | Yamaha Motor NV | Yamaha | +1'00.400 | 12 | ||||
| 3 | Alex George | Yamaha | +1'52.100 | 10 | |||||
| 4 |  Karl Auer | Racing Team NO | Yamaha | +2'26.100 | 8 | ||||
| 5 |  Olivier Chevallier | Yamaha | +2'37.000 | 6 | |||||
| 6 | Chas Mortimer | Sarome Racing | Yamaha | +3'18.600 | 5 | ||||
| 7 | Marcel Ankoné | Marcel Ankoné | Suzuki | +3'33.700 | 4 | ||||
| 8 | Hans Braumandl | Yamaha | +1 lap | 3 | |||||
| 9 | Børge Nielsen | Yamaha | +1 lap | 2 | |||||
| 10 |  Anssi Resko | Yamaha | +2 laps | 1 | |||||
| 11 | Charlie Dobson | Yamaha | +2 laps | ||||||
| Ret | Peter Baláž | Yamaha | Retired | ||||||
| Ret | Philippe Coulon | GIR | Yamaha | Retired | |||||
| Ret | Jean-Paul Boinet | Yamaha | Retired | ||||||
| Ret | Michael Schmid | Racing Team NO | Rotax | Retired | |||||
| Ret | Paolo Tordi | Yamaha | Retired | ||||||
| Ret | Horst Lahfeld | König | Retired | ||||||
| Ret | Bohumil Staša | Jawa | Accident | ||||||
| Ret | Teuvo Länsivuori | Suzuki Motor Company | Suzuki | Fuel problems | |||||
| Ret | Dick Alblas | König | Retired | ||||||
| Ret | Piers Forester | Yamaha | Retired | ||||||
| Ret |  Jack Findlay | Yamaha | Retired | ||||||
| Ret | Barry Sheene | Suzuki Motor Company | Suzuki | Retired | |||||
| Ret | Pentti Korhonen | Yamaha | Retired | ||||||
| Ret | John Williams | Yamaha | Retired | ||||||
| Ret | Helmut Kassner | Yamaha | Retired | ||||||
| Ret | Hans-Otto Butenuth | Yamaha | Retired | ||||||
| Ret | Ulrich Eickmeyer | König | Retired | ||||||
| Sources:[4] [5] | |||||||||