10 September 1978 at Spaxton
| Unlimited (SW Centre Championship) | RH Sidecars (SW Centre Championship) | Experts |
| 1- Gerry Smith | 1- Pete Robson & Dave Hopes | 1- Gerry Smith |
| 2- Mike Davis | 2- Richard Peberdy & Jim Head | 2- Mike Davis |
| 3- Dave Threadingham | 3- Ken Jones & Steve Wheeler | 3- Dave Threadingham |
| Unlimited | RH Sidecar Experts | Juniors |
| 1- Gerry Smith | 1- Pete Robson & Dave Hopes | 1- Roger Dunford |
| 2- Mike Davis | 2- Richard Peberdy & Jim Head | 2- Tony George |
| 3- Dave Threadingham | 3- Pete Dyer & Dave Harris | 3- Tony Usher |
| RH Sidecar Open | up to 350cc | RH Sidecars Juniors |
| 1- Pete Robson & Dave Hopes | 1- Dave Threadingham | 1- Ian McAuley & Martin Gibson |
| 2- Richard Peberdy & Jim Head | 2- Adrian Kessell | 2- Phil Robson & S. Council |
| 3- Pete Dyer & Dave Harris | 3- Mervyn Smallwood | 3- Salvatore deGregorio & George Schofield |
27 March 1978 at Cannington
| Unlimited (SW Centre Championship) | RH Sidecars (SW Centre Championship) | Experts |
| 1- Gerry Smith | 1- Alan Wheeler & John Roberts | 1- Gerry Smith |
| 2- Ian Barclay | 2- Rob Stoneman & Shaun Jennings | 2- Keith Richards |
| 3- Dave Threadingham | 3- Ken Jones & Steve Wheeler | 3- Ian Barclay |
| Club Members | RH Sidecar Experts | Juniors (Junior Shield) |
| 1- John Williams | 1- Ken Jones & Steve Wheeler | 1- Roger Dunford |
| 2- Neil Farnish | 2- Alan Wheeler & John Roberts | 2- Mark Jarvis |
| 3- Roger Dunford | 3- Richard Peberdy & Jim Head | 3- Ken Hawker |
| RH Sidecar Open (Club Members) | 350cc | RH Sidecars Juniors (Junior Shield) |
| 1- Alan Wheeler & John Roberts | 1- Neil Farnish | 1- Rob Stoneman & Shaun Jennings |
| 2- Richard Peberdy & Jim Head | 2- Dave Threadingham | 2- John Bowerman & James Roppert |
| 3- Den Carter & Chris Carter | 3- Chris Sheppard | 3- John Callander & Dee Scource |