21 October 1973 at Clyst St. Mary
| Unlimited (SW Centre Championship) | RH Sidecars (SW Centre Championship) | Experts |
| 1- Lew Coffin | 1- Gerry Wheeler & John Holt | 1- Lew Coffin |
| 2- Richard Eslick | 2- Dave Heath & Dennis Ell | 2- John Webb |
| 3- John Webb | 3- David John & Michael John | 3- Chris Julian |
| Open | RH Sidecars Open (2) | 350cc |
| 1- Richard Eslick | 1- Dave Heath & Dennis Ell | 1- Adrian Moss |
| 2- Mike Perkins | 2- Ken Jones & Benjie Pople | 2- Adrian Kessell |
| 3- David Purchase | 3- ANOther | 3- Patrick McMann |
| RH Sidecars Open (1) | RH Sidecars Juniors | |
| 1- Dave Heath & Dennis Ell | 1- David Westaway & Joe Sturtridge | |
| 2- Ken Jones & Benjie Pople | 2- Michael Sandiford & Ray Prince | |
| 3- S. de Gregorio & George Schofield | 3- M. Hitchings & K. Eddy |