17 June 1984 at St. Newlyn East
| 500cc | 350cc | 250cc |
| 1- Wayne Barrett | 1- Dave Wallis | 1- Mark Nicholson |
| 2- Richard Eslick | 2- Mark Nicholson | 2- Philip Sims |
| 3- Paul Pratt | 3- Mike Bowden | 3- Will James |
| 4- Gary Hickmott | 4- Adrian Kessell | 4- Darren Bishop |
| 5- Mike Eslick | 5- John Bostin | 5- Ritchie Knight |
| 6- Nigel Green | 6- Alan Wilson | 6- Neil Scopes |
| RH Sidecars | LH Sidecars | |
| 1- Ken Hicks & John Peters | 1- Barry Huggett & Nigel Shaw | |
| 2- Charlie Coleman & Adam Cowper-Smith | 2- Dave Steer & Alan Marshall | |
| 3- Dave Westaway & Alan Borlase | 3- Neil Cuff & Ian Walker | |
| 4- Ian McAuley & Andy Robson | 4- David Fielding & Tony Lindus | |
| 5- Martin Phillips & John Phillips | 5- John O’Donnell & Paul Robertson | |
| 6- Mike Glaysher & B. Stevens | 6- Dave Roberts & Russell Steel |