Pro Race - Class Structure
| Class | Notes | Age | Weight | Tires | Suggested Gearing |
| Kid Kart | WKA rules - no restrictor | 5-7 | 150 | Open | n/a |
|
Yamaha |
WA55b carb with RLV YBX exhaust Suggested for less experienced drivers |
7-12 | 200 | YKC | 11/73 |
| Yamaha Sportsman |
WA55b carb with RLV SSX exhaust |
8-12 | 250 | YKC | 11/73 |
| HPV Sportsman |
WA55b carb with HPV 1 | 8-12 | 250 | YKC | 11/73 |
| Yamaha Junior | RLV SSX exhaust | 12-15 | 305 |
YKC |
11/79 |
| Yamaha Supercan |
RLV SSX exhaust | 15+ | 345 | YKC | 11/80 |
| HPV Heavy |
WB3a carb with HPV-4 pipe |
15+ | 360 | YKC | 11/80 |
| TAG | WKA engine rules and weights | 15+ | WKA | YKC | Leopard 11/82 |
| TAG Masters |
WKA Masters engine rules and weight. |
30+ | WKA | YKC | Leopard 11/83 |
| 125cc Shifter | ICC or Moto Engine | 15+ | 385 | Open | |
| Spec Racer | Chassis and engine per Spec Racer Specific Rules |
12+ | 380 | O.E.M. or MG IR |
stock |
| ROTAX | |
||||
| Micro Max | Junior cylinder, restrictors, 'micro' kit Spec gear - 14x73 |
7-10 | 235 | Mojo D2 | 14/73 |
| Mini Max | Junior cylinder and restrictors Spec gear - 13x82 |
9-12 | 265 | Mojo D2 | 13/82 |
| Junior | Junior cylinder (no exhaust valve) | 13-16 | 320 | Mojo D2 | |
| Senior Max | 15+ | 365 | Mojo D2 | 12/78 | |
| Master | *Age 32+ or 16+ & 190lbs with all gear except helmet |
32+* | 405 | Mojo D2 | 12/79 |
| DD2 | 15+ | 385 | Mojo D3 |
