St. Joseph, MO
Agency Motocross
- August 13, 1978
- July 3, 1977
All-Time Wins
450 Class
| Rider | Hometown | Wins |
|---|---|---|
| Rex Staten |  Fontana, CA | 1 |
250 Class
| Rider | Hometown | Wins |
|---|---|---|
 Bob Hannah | Whittier, CA | 1 |
 Broc Glover | El Cajon, CA | 1 |
| Rider | Hometown | Wins |
|---|---|---|
| Rex Staten | Fontana, CA | 1 |
| Rider | Hometown | Wins |
|---|---|---|
| Bob Hannah | Whittier, CA | 1 |
| Broc Glover | El Cajon, CA | 1 |