18 October 1998 at Milnathorp
| Open | 500cc | Pre 75s |
| 1- Tony Atkin | Under 40s | 1- Ralph Yeaman |
| 2- Steve Mildoon | 1- Tony Atkin | 2- Derek Allan |
| 3- Graham Blackie | 2- Steve Mildoon | 3- Stephen Swann |
| 3- Anthony Pye | ||
| Over 40s | ||
| 1- John Wilson | ||
| 2- David Roy | ||
| 3- Andy Graham |
27 September 1998 at Kinross
| Open | Pre 75s | 350cc |
| Vic Allan | 1- Vic Allan | 1- Richard Ashworth |
| 2- Barry Allan | 2- Colin Barrie | 2- Ray Morriss |
| 3- Grant Blackie | 3- Ralph Yeaman | 3- John Shipley |
| Over 40s | Under 40s | |
| 1- John Shipley | 1- Grant Blackie | |
| 2- John Wilson | 2- Graham Blackie | |
| 3- Richard Ashworth | 3- Barry Allan |
13 September 1998 at Kinross
| Over 40s | Pre 75s | Under 40s |
| 1- John Wilson | 1- Vic Allan | 1- Brian Clark |
| 2- David Roy | 2- Derek Allan | 2- Grant Blackie |
| 3- Andy Bousie | 3- Steven Swan | 3- Barry Allan |