In the Youth Classes, when a rider reaches the maximum age limit for his/her group, he/she may continue to compete in that group until the end of the calendar year. On reaching the minimum age for the next group, the rider may upgrade. Please note that any rider who chooses to upgrade cannot then move back to the lower capacity class once they have competed at the higher level.
Quad
| Class Name | Licence | Age | Restrictions |
| 50cc Standard | Y1 | 6-9 | 50cc, no power mods, Auto |
| 50cc Modified | Y1 | 6-9 | 50 cc 2T, 100cc 4T no mods to 4T, Auto |
| 100cc Standard | Y2 |
8-13 |
100cc 2T, 150cc 4T, manufacturer build, Auto |
| 100cc Modified | Y2 |
8-13 |
100cc 2T, 150cc 4T, Auto |
| 100cc Geared Air Cooled | Y2 |
9-13 |
119cc 2T, 179cc 4T, air cooled |
| 100cc Geared Water Cooled | Y2 |
9-13 |
119cc 2T, 179cc 4T, water cooled |
| 150cc Open Geared | Y3 |
11-16 |
119cc 2T, 179cc 4T, race with 250s |
| 250 Standard | Y3 |
11-16 |
200cc 2T, 250cc 4T, no power mods |
| 250 Modified | Y3 |
11-16 |
239cc 2T, 299cc 4T, air cooled production only |
| 250 Open | Y4 | 11-17 | 239cc 2T, 299cc 4T, air cooled production only |
| Novice | Adult | 15+ | 450cc, only by prior agreement with club |
| Clubman | Adult | 15+ | 550cc 2T 2 cyl, 800cc 4T 1 cyl |
| Seniors | Adult | 40+ | 550cc 2T 2 cyl, 800cc 4T 1 cyl |
| Adult Championship | Adult | 15+ | 550cc 2T 2 cyl, 800cc 4T 1 cyl |
Sidecarcross
| Class Name | Licence | Age | Restrictions |
| Sidecar 250 | YSC1 | 9 - 11 yrs | Maximum 150cc 2 stroke / 250cc 4 stroke |
| Sidecar 450 | YSC2 | 11 - 16 yrs | Maximum 250cc 2 stroke / 450cc 4 stroke |
| NETT Sidecars | Adult | 15+ | 350-1000cc 2T, 750cc 2T |