Chas Mortimer Grand Prix motorcycle racing results Grand Prix motorcycle racing results

| Year_ | Class_ | Team | Points | Wins |
|---|---|---|---|---|
| 1969 | 125cc | Villa | 5 | 0 |
| 1969 | 250cc | Yamaha | 8 | 0 |
| 1970 | 125cc | Villa | 5 | 0 |
| 1970 | 250cc | Yamaha | 30 | 0 |
| 1970 | 350cc | Yamaha | 15 | 0 |
| 1971 | 125cc | Yamaha | 48 | 1 |
| 1971 | 250cc | Yamaha | 42 | 0 |
| 1972 | 125cc | Yamaha | 87 | 1 |
| 1972 | 250cc | Yamaha | 18 | 0 |
| 1972 | 350cc | Yamaha | 0 | 0 |
| 1972 | 500cc | Yamaha | 42 | 1 |
| 1973 | 125cc | Yamaha | 75 | 1 |
| 1973 | 250cc | Yamaha | 40 | 0 |
| 1973 | 500cc | Yamaha | 8 | 0 |
| 1974 | 250cc | Yamaha | 41 | 1 |
| 1974 | 350cc | Yamaha | 29 | 0 |
| 1974 | 500cc | Yamaha | 4 | 0 |
| 1975 | 250cc | Yamaha | 46 | 1 |
| 1975 | 350cc | Yamaha | 31 | 0 |
| 1975 | 500cc | Yamaha | 23 | 0 |