Jack Ahearn Motorcycle Grand Prix results Motorcycle Grand Prix results

| Year_ | Class_ | Team | Points | Wins |
|---|---|---|---|---|
| 1954 | 350cc | Norton | 0 | 0 |
| 1954 | 500cc | Norton | 0 | 0 |
| 1955 | 350cc | Norton | 0 | 0 |
| 1955 | 500cc | Norton | 1 | 0 |
| 1958 | 350cc | AJS | 0 | 0 |
| 1958 | 500cc | Matchless | 0 | 0 |
| 1962 | 350cc | Norton | 0 | 0 |
| 1962 | 500cc | Norton | 0 | 0 |
| 1963 | 125cc | Ducati | 0 | 0 |
| 1963 | 350cc | Norton | 4 | 0 |
| 1963 | 500cc | Norton | 5 | 1 |
| 1964 | 125cc | Honda | 0 | 0 |
| 1964 | 250cc | Suzuki | 0 | 0 |
| 1964 | 350cc | Norton | 1 | 0 |
| 1964 | 500cc | Norton | 25 | 1 |
| 1965 | 500cc | Norton | 9 | 0 |
| 1966 | 350cc | Norton | 8 | 0 |
| 1966 | 500cc | Norton | 13 | 0 |
| 1974 | 350cc | Yamaha | 0 | 0 |