John Duffy
Record type: Motorsport Biographies
Competed in
| Race | Position | Time | Speed | Machine |
|---|---|---|---|---|
| 1970 Senior MGP | 7 | 2:24:05.00 | 92.12 | Norton |
| 1970 Junior MGP | 20 | 2:38:11.00 | 85.87 | Norton |
| 1969 Senior MGP | 10 | 2:34:03.00 | 88.18 | Norton |
| 1969 Junior MGP | 15 | 2:36:40.00 | 86.71 | Norton |
| 1968 Senior MGP | R | Norton | ||
| 1968 Junior MGP | 10 | 2:38:19.00 | 85.8 | Norton |
| 1967 Senior MGP | R | Norton | ||
| 1967 Junior MGP | 3 | 2:49:50.00 | 79.98 | Norton |
| 1966 Senior MGP | 17 | 2:41:05.00 | 84.33 | Norton |
| 1966 Junior MGP | 25 | 2:41:06.00 | 84.32 | Norton |