1978 Formula 2 TT
Course name: Mountain (post 1914)
Course length: 150.92 miles (4 laps)
Competitors
| Position | Competitor(s) | Time | Speed | Machine |
|---|---|---|---|---|
| 1 | Jackson, Alan | 1:31:08.60 | 99.35 | Honda |
| 2 | Mason, Dave | 1:32:42.00 | 97.68 | Honda |
| 3 | Tuxworth, Neil | 1:34:06.80 | 96.21 | Honda |
| 4 | Haslam, Ron | 1:34:59.80 | 95.32 | Honda |
| 5 | Dunlop, Joey | 1:36:56.00 | 93.41 | Benelli |
| 6 | Davies, Peter | 1:39:38.40 | 90.87 | Laverda |
| 7 | Kirkby, John | 1:41:24.00 | 89.3 | Honda |
| 8 | Willison, Thomas | 1:42:50.00 | 88.05 | Honda |
| 9 | Casement, Denis | 1:45:33.60 | 85.78 | Honda |
| 10 | Kerby, Dave | 1:47:01.00 | 84.61 | Honda |
| 11 | Kerner, Hartley | 1:49:55.00 | 82.38 | Honda |
| 12 | Kirwan, Mal | 2:00:48.20 | 74.95 | Honda |
| R | Russell, Martin | BSA | ||
| R | Crick, John | Honda | ||
| R | Goodfellow, Dave | Honda | ||
| R | Richards, Ian | Honda | ||
| R | Rutter, Frank | Honda | ||
| R | Bowler, Roger | Suzuki | ||
| R | McMillan, Dennis | Triumph | ||
| R= | McMillan, Dennis | Triumph | ||
| R | Clancy, Denis | Yamaha | ||
| R | Roberts, Barry | Yamaha | ||
| R | Knight, Ray | Honda | ||
| R | Oldfield, John | Honda |