16 September 1990 at Husthwaite
| 350cc (First) | Unlimited (Final) | 350cc (Second) |
| 1- R. Winterburn | 1- C. Earl | 1- R. Winterburn |
| 2- D. Norris | 2- R. Winterburn | 2- D. Norris |
| 3- J. Hartley | 3- S. Green | 3- M. Wilson |
| 250cc (First) | 350cc (Third) | 250cc (Second) |
| 1- R. Bradley | 1- R. Winterburn | 1- R. Bradley |
| 2- R. Fleetham | 2- I. Wilson | 2- R. Fleetham |
| 3- K. Wilson | 3- D. Norris | 3- B. Cordon |
| Trail (First) | 250cc (Third) | Trail (Second) |
| S. Brailsford | 1- R. Bradley | S. Brailsford |
| 2- B. Cordon | ||
| Trail (Third) | 3- R. Cope | Trail (Fourth) |
| S. Brailsford | S. Brailsford |