
| Class | Weight | Comment |
| A | 0-2700 | JR. Division |
| B | 0-3200 | JR. Division |
| C | 0-3700 | JR. Division |
| D | 0-4200 | JR. Division |
| E | 0-4700 | JR. Division |
| H | 0-5500 | JR. Division |
| K | 0-6500 | JR. Division |
| O | 0-7500 | JR. Division |
| S | 0-8500 | JR. Division |
| Class | Weight | Comment |
| F | 0-4700 | . |
| I | 0-5500 | . |
| L | 0-6500 | . |
| P | 0-7500 | . |
| T | 0-8500 | 4mph; Turbo and Radials Allowed |
| V | 0-10000 | 4 mph; Turbo and Radials Allowed |
| Class | Weight | Comment |
| G | 0-4700 | . |
| J | 0-5500 | . |
| M | 0-6500 | . |
| N | 0-5500 | V8 Class. 5000 rpm max. |
| Q | 0-7500 | . |
| R | 0-6500 | V8 Class. 5000 rpm max. |
| R | 0-8500 | . |

