11 October 1998 at St. Erme
| Open | RH Sidecars (Open) | Experts |
| 1- Jason Prynne | 1- Kenny Hammill & John Richards | 1- Jason Prynne |
| 2- Chris Bennett | 2- Andy Symons & Shaun Yates | 2- Richard Ford |
| 3- Mike Bowden | 3- Richard Thomas & Kevin Woodley | 3- Chris Bennett |
| 500cc | RH Sidecars (Juniors) | Pre 75s |
| 1- Jason Prynne | 1- Wayne Westaway & Steve Courtney | 1- Mike Bowden |
| 2- Chris Bennett | 2- Adrian Kessell | |
| 3- Richard Ford | 250cc | 3- Simon Ferris |
| 1- Adrian Kessell | ||
| 350cc | 2- Peter Pollard | Intermediates |
| 1- Chris Bennett | 1- J. Lambert | |
| 2- Mike Bowden | Quads | 2- A. Rowe |
| 3- Adrian Kessell | 1- Robert Barnard | 3- C. Caddy |
| 2- Shaun Edwards | ||
| 3- Mark Quintrell |
20 September 1998 at St. Erme
| Open | RH Sidecars | 500cc |
| 1- Chris Bennett | 1- Richard Thomas & Kevin Woodley | 1- Wayne Barrett |
| 2- Paul Armstrong | 2- Kevin Stevens & Dave Hogan | 2- Chris Bennett |
| 3- Kevin Hamly | 3- Andy Symoins & Shaun Yates | 3- Richard Ford |
| Experts | 350cc | Junior |
| 1- Wayne Barrett | 1- Mike Bowden | 1- Paul Armstrong |
| 2- Chris Bennett | 2- Chris Bennett | 2- Kevin Hamly |
| 3- Richard Ford | 3- Adrian Kessell | 3- Stuart Togneri |
| Pre 75s | 250cc | Invitation |
| 1- Mike Bowden | 1- Michael Edwards | 1- Stuart Togneri |
| 2- Adrian Kessell | 2- Peter Pollard | 2- Matthew Huddy |
| 3- Peter Pollard | 3- Simon Ferris | 3- Dave Heath |
| Auto Cadets | Intermediates | Quads |
| 1- Terry Boswell | 1- Adrian Rowe | 1- Robert Barnard |
| 2- Karl Rowe | 2- Shaun Edwards | |
| 3- Chesney King | Juniors | 3- Mark Quintrell |
| 1- Danny Tresidder | ||
| Cadets | ||
| 1- Andy Boswell |