| 15 | Broome-Tioga Sports Center | 500MX 500MX | August 24, 1980 | Yamaha |
| 12 | Los Angeles 2 | 250SX 450SX | July 13, 1980 | Yamaha |
| 11 | Washougal Motocross | 500MX 500MX | July 6, 1980 | Yamaha |
| 13 | Lakewood Sports Cycle Park | 500MX 500MX | June 15, 1980 | Yamaha |
| 8 | Atlanta International Raceway | 500MX 500MX | June 8, 1980 | Yamaha |
| 15 | RedBud Track 'n Trail | 500MX 500MX | June 1, 1980 | Yamaha |
| 18 | High Point Raceway | 500MX 500MX | May 25, 1980 | Yamaha |
| 8 | Metrolina Speedway Park | 500MX 500MX | August 19, 1979 | Yamaha |
| 14 | Broome-Tioga Sports Center | 500MX 500MX | August 12, 1979 | Yamaha |
| 15 | Rio Bravo MX Park | 500MX 500MX | August 5, 1979 | Yamaha |
| 19 | High Point Raceway | 500MX 500MX | July 8, 1979 | Yamaha |
| 17 | RedBud Track 'n Trail | 500MX 500MX | July 1, 1979 | Yamaha |
| 21 | Lakewood Sports Cycle Park | 500MX 500MX | June 24, 1979 | Yamaha |
| 16 | Sears Point International Raceway | 500MX 500MX | June 17, 1979 | Yamaha |