| 1G - Formula III | 2G - Formula II |
| 2V - 250 Vintage | 4P - 450 Clubman |
| 4S - 450 Superbike | 5V - 500 Vintage |
| 6P - 600 Supersport | 6S - 600 Superbike |
| 6T - 650 GP Twins | 6X - 600 Supersport Senior |
| 6Z - 600 Superbike Senior | 7P - 750 Supersport |
| 7S - 750 Superbike | 7X - 750 Supersport Senior |
| 7Z - 750 Superbike Senior | 8G - 85 GP |
| DS - Dinosaur | ES - Electric Superbike |
| FF - Formula Female | FU - Formula Ultra |
| LS - Lightweight Superbike | MC - Middleweight Classic Superbike |
| MP - Middleweight Supersport | MS - Middleweight Superbike |
| NV4 - Novice 4 | NV5 - Novice 5 |
| OC - Open Classic Superbike | OP - Open Supersport |
| OS - Open Superbike | OV - Open Vintage |
| OX - Open Supersport Senior | OZ - Open Superbike Senior |
| SC - Smallbore Classic Superbike | TP - Open Twins Supersport |
| TS - Open Twins Superbike | US - Ultra Lightweight Superbike |