22 April 1990 at Odcombe
| 500cc | 350cc | Open |
| 1- Paul Fry | 1- Mike Beaumont | 1- Trevor Banks |
| 2- Trevor Banks | 2- Mark Seabright | 2- Tim Fey |
| 3- Tim Fey | 3- Josh Bostin | 3- Ritchie Knight |
| RH Sidecars | RH Sidecars (Open) | |
| 1- Martin Baker & Mark Edwards | 1- Martin Baker & Mark Edwards | |
| 2- Pete Dyer & Shane Lapham | 2- Shane Baker & Clinton Martin | |
| 3- Shane Baker & Clinton Martin | 3- A. Davies & M. Lapham |