19 August 1990 at Sandford
| 350cc | 500cc Sidecars | 250cc |
| 1- Andy Riley | 1- Carl Squirrell & Lynn Green | 1- Mark Wadsworth |
| 2- Clayton Williams | 2- Kevin Leide & Alan Pithouse | 2- Ian Rutter |
| 3- Wayne Broadhurst | 3- Cecil Taylor & Alastair Haggaty | 3- Jason Stott |
| 4- Joe Screen | 4- Trevor Steward & Ronnie Steward | 4- John Dormer |
| 5- Dave Mander | 5- Roger Newman & Howard Taylor | 5- Mark Nicholson |
| 6- Lee Potter | 6- Dave Collin & Shane Lingwood | 6- Steve Hines |
1 April 1990 at Hanmer
| 500cc | RH Sidecars | 350cc |
| 1- Joe Screen | 1- Martin Baker & Mark Edwards | 1- Wayne Broadhurst |
| 2- Andy Riley | 2- Malcolm Howes & Andy Walsh | 2- Dave Norris |
| 3- Phil Alderman | 3- Shawn Ryan & Craig Hall | 3- Steve Garside |
| 250cc | ||
| 1- Mark Wadsworth | ||
| 2- Ian Rutter | ||
| 3- Jason Stott |