1978 Senior TT
Course name: Mountain (post 1914)
Course length: 226.38 miles (6 laps)
Competitors
| Position | Competitor(s) | Time | Speed | Machine |
|---|---|---|---|---|
| 1 | Herron, Tom | 2:01:33.40 | 111.74 | Suzuki |
| 2 | Guthrie, Billy | 2:06:05.40 | 107.72 | Suzuki |
| 3 | Mortimer, Chas | 2:06:48.40 | 107.11 | Yamaha |
| 4 | Fogarty, George | 2:07:01.60 | 106.92 | Suzuki |
| 5 | George, Alex | 2:07:45.60 | 106.31 | Suzuki |
| 6 | Smith, Bill | 2:08:16.40 | 105.89 | Suzuki |
| 7 | Ireland, Denis | 2:09:05.20 | 105.22 | Suzuki |
| 8 | Waring, Graham | 2:09:23.40 | 104.97 | Yamaha |
| 9 | Woodley, John | 2:09:26.00 | 104.94 | Suzuki |
| 10 | Ingham, Bill | 2:09:27.00 | 104.92 | Yamaha |
| 11 | Lindsay, Joe | 2:09:57.00 | 104.52 | Yamaha |
| 12 | Murray, Bernard | 2:10:05.60 | 104.4 | Yamaha |
| 13 | Weeden, John | 2:10:17.80 | 104.24 | Yamaha |
| 14 | Marshall, Roger | 2:11:14.20 | 103.49 | Yamaha |
| 15 | Jackson, Alan | 2:11:31.40 | 103.27 | Suzuki |
| 16 | Simpson, Bill | 2:11:55.40 | 102.96 | Yamaha |
| 17 | Chatterton, Derek | 2:11:56.20 | 102.94 | Yamaha |
| 18 | Rae, Bill | 2:11:57.80 | 102.92 | Suzuki |
| 19 | Tuxworth, Neil | 2:12:04.60 | 102.84 | Yamaha |
| 20 | Burrows, Ricky | 2:12:14.00 | 102.71 | Yamaha |
| 21 | Labuschagne, Peter | 2:12:57.40 | 102.16 | Yamaha |
| 22 | Scott, Jim | 2:13:48.80 | 101.5 | Yamaha |
| 23 | Casement, Denis | 2:13:55.00 | 101.42 | Yamaha |
| 24 | Harrison, Kenny | 2:14:28.20 | 101.01 | Yamaha |
| 25 | Coates, Ernie | 2:14:58.00 | 100.63 | Yamaha |
| 26 | Haslam, Ron | 2:15:38.40 | 100.13 | Yamaha |
| 27 | Duffus, Alan | 2:16:28.80 | 99.52 | Yamaha |
| 28 | Hailwood, Mike | 2:16:41.80 | 99.36 | Yamaha |
| 29 | Goodfellow, Dave | 2:16:48.40 | 99.28 | Yamaha |
| 30 | Lawton, Alan | 2:17:04.60 | 99.08 | Yamaha |
| 31 | Cormican, Donal | 2:18:31.00 | 98.05 | Yamaha |
| 32 | Rigg, Nigel | 2:19:11.20 | 97.58 | Yamaha |
| 33 | Hughes, Dave | 2:20:12.60 | 96.87 | Matchless |
| 34 | Vogt, Gerhard | 2:21:13.60 | 96.17 | Yamaha |
| 35 | Adler, Mike | 2:21:30.00 | 95.99 | Yamaha |
| 36 | Katayama, Takazumi | 2:22:37.60 | 95.23 | Yamaha |
| 37 | Duncan, Mike | 2:22:50.40 | 95.09 | Yamaha |
| 38 | Trollope, Dennis | 2:25:49.00 | 93.15 | Yamaha |
| 39 | Lavender, John | 2:26:12.80 | 92.89 | Yamaha |
| 40 | Wilhelm, Wolfgang | 85.35 | Yamaha | |
| 41 | Schieferecke, Herbert | 78.69 | Yamaha | |
| 42 | Kirwan, Mal | 78.39 | Yamaha | |
| 43 | Rastel, Michel | 76.92 | Yamaha | |
| 44 | Clancy, Denis | 33.5 | Yamaha | |
| R | Blake, Kenny | Suzuki | ||
| R | Bowman, Bill | Suzuki | ||
| R | Hennen, Pat | Suzuki | ||
| R | Manship, Steve | Suzuki | ||
| R | Shimmin, Danny | Suzuki | ||
| R | Williams, John G. | Suzuki | ||
| R | Asami, Sadao | Yamaha | ||
| R | Chatterton, Mick | Yamaha | ||
| R | Cull, Steve | Yamaha | ||
| R | Hickman, Dave | Yamaha | ||
| R | Higgins, Mick | Yamaha | ||
| R | Higham, Jack | Yamaha | ||
| R | Horton, Clive | Yamaha | ||
| R | Inwood, Ken | Yamaha | ||
| R | Jeffreys, Roy | Yamaha | ||
| R | Junk, Courtney | Yamaha | ||
| R | Mason, Dave | Yamaha | ||
| R | McKane, Terry | Yamaha | ||
| R | Mortimer, Derek | Yamaha | ||
| R | Moyce, Asa | Yamaha | ||
| R | Neve, Chris | Yamaha | ||
| R | Nicholls, Roger | Yamaha | ||
| R | Niven, Ronnie | Yamaha | ||
| R | Peters, Brian | Yamaha | ||
| R | Randall, Derek | Yamaha | ||
| R | Richards, Ian | Yamaha | ||
| R | Sayle, Jeff | Yamaha | ||
| R | Tonkin, Steve | Yamaha | ||
| R | Trotter, Les | Yamaha | ||
| R | Wrettom, Kevin | Yamaha | ||
| R | Roberts, Eddie | Suzuki | ||
| R | Martin, Keith | Yamaha | ||
| R | Grant, Mick | Kawasaki | ||
| R | Williams, Charlie | Yamaha | ||
| R | Fulton, Bill | Yamaha | ||
| R | Dunlop, Joey | Yamaha | ||
| R | Dawson, Walter | Yamaha |