1989 Supersport 600 TT
Course name: Mountain (post 1914)
Course length: 150.92 miles (4 laps)
Competitors
| Position | Competitor(s) | Time | Speed | Machine |
|---|---|---|---|---|
| 1 | Hislop, Steve | 1:20:25.80 | 112.58 | Honda |
| 2 | Leach, Dave | 1:20:54.60 | 111.91 | Yamaha |
| 3 | Whitham, Jamie | 1:21:05.60 | 111.66 | Suzuki |
| 4 | Mellor, Phil | 1:21:16.20 | 111.42 | Suzuki |
| 5 | Morrison, Brian | 1:21:36.20 | 110.96 | Honda |
| 6 | Jefferies, Nick | 1:21:37.60 | 110.93 | Yamaha |
| 7 | Young, Ian | 1:22:28.80 | 109.78 | Honda |
| 8 | Selby, Howard | 1:22:33.80 | 109.67 | Yamaha |
| 9 | Batson, Alan | 1:22:54.00 | 109.23 | Yamaha |
| 10 | Rea, Johnny | 1:23:05.40 | 108.98 | Honda |
| 11 | Linsdell, Steve | 1:23:16.40 | 108.74 | Yamaha |
| 12 | Duffus, Iain | 1:23:27.40 | 108.5 | Yamaha |
| 13 | Nicholls, Phil | 1:24:19.20 | 107.39 | Honda |
| 14 | Raynor, Brian | 1:24:31.00 | 107.14 | Yamaha |
| 15 | Simpson, Ian | 1:24:37.20 | 107.01 | Suzuki |
| 16 | Armes, Phil | 1:24:59.00 | 106.55 | Honda |
| 17 | Johnson, Steve | 1:25:29.40 | 105.92 | Yamaha |
| 18 | Ashton, Dean | 1:25:44.40 | 105.61 | Honda |
| 19 | Henry, Sammy | 1:25:59.20 | 105.3 | Yamaha |
| 20 | Hodson, Jim | 2:16:35.60 | 104.57 | Honda |
| 21 | Sharratt, Dave | 1:26:46.60 | 104.35 | Yamaha |
| 22 | Seward, Mike | 1:26:53.70 | 104.21 | Honda |
| 23 | McStay, Sean | 1:27:14.00 | 103.8 | Yamaha |
| 24 | Galbraith, Eric | 1:27:39.40 | 103.3 | Honda |
| 25 | Petty, Chris | 1:27:41.40 | 103.25 | Honda |
| 26 | Knight, Ray | 1:27:52.40 | 103.04 | Honda |
| 27 | Wood, Nat | 1:28:24.20 | 102.43 | Yamaha |
| 28 | McCallen, Phillip | 1:28:45.80 | 102.01 | Honda |
| 29 | Gibson, Iain | 1:28:57.00 | 101.8 | Yamaha |
| 30 | McClements, Sam | 1:29:52.80 | 100.74 | Honda |
| 31 | Hanna, Ray | 1:29:53.80 | 100.72 | Honda |
| 32 | Topping, Michael | 1:29:58.00 | 100.65 | Honda |
| 33 | Rutter, Frank | 1:30:03.00 | 100.55 | Honda |
| 34 | Allan, Robbie | 1:30:38.80 | 99.89 | Yamaha |
| 35 | Goodley, David | 1:30:41.80 | 99.84 | Suzuki |
| 36 | Butenuth, Hans-Otto | 1:31:42.80 | 98.73 | Honda |
| 37 | Jessopp, Andy | 1:32:43.20 | 97.65 | Yamaha |
| 38 | Donnan, John | 1:32:45.20 | 97.62 | Honda |
| 39 | Campbell, Crighton | 1:32:53.00 | 97.49 | Honda |
| 40 | Stengl, Manfred | 1:34:03.80 | 96.26 | Suzuki |
| 41 | Kerby, Dave | 1:43:33.20 | 95.76 | Honda |
| R | Thomson, Rory | Yamaha | ||
| R | Cranston, Paul | Honda | ||
| R | Duffy, Frank | Honda | ||
| R | Moodie, Jim | Honda | ||
| R | Talton, Robert | Honda | ||
| R | Farmer, Mark | Kawasaki | ||
| R | Swann, Ray | Kawasaki | ||
| R | Roberts, Eddie | Yamaha | ||
| R | Reid, Brian | Yamaha |