Frittenden 1998
South-Eastern Centre Championship
13 September 1998 at Frittenden
| Unlimited | RH Sidecars | 500cc |
| 1- Richard Smith | 1- Vaughan Roberts & Terry Madeley | 1- Tony Dart |
| 2- Steve Syrett | 2- Rick Colvin & Matthew Dix | 2- Vince Kinchin |
| 3- Vince Kinchin | 3- Paul Johnson & Dave Chopping | 3- Mitch Godden |
| 350cc | LH Sidecars | 250cc |
| 1- Paul Knott | 1- Martin Cuff & Jason Relf | 1- Richard Smith |
| 2- Mitch Godden | 2- Hywel Phillips & Jamie Moss | 2- Steve Syrett |
| 3- Phil Ranson | 3- Jon Fish & John Wadey | 3- Richard Sims |
