Sears Point International Raceway
June 11 1978
500MX Results
| Rider | Hometown | Motos | ||
|---|---|---|---|---|
| 1 | Tommy Croft | San Diego, CA  | 1 - 3 |  |
| 2 |  Marty Smith | San Diego, CA | 4 - 2 | |
| 3 | Mike Bell | Lakewood, CA | 3 - 4 |  |
| 4 | Rex Staten | Fontana, CA | 2 - 5 | |
| 5 | Rick Burgett | Sandy, OR | - 1 | |
| 6 | Brian Jodry | Rancho Cordova, CA | 9 - 8 | Maico |
| 7 | Danny Laporte | Yucca Valley, CA | 5 - 12 |  |
| 8 | Frank Stacy | Cheektowaga, NY | 10 - 11 |  |
| 9 | Mickey Boone | Winston Salem, NC | 17 - 7 | |
| 10 | Robert Myers | Antioch, CA | 14 - 10 | Maico |
| 11 | Gary Semics | Lisbon, OH | 11 - 13 | Can-am |
| 12 | Jim Turner | Woodside, CA | 19 - 6 |  |
| 13 | Steve Stackable | Austin, TX | 6 - 20 |  |
| 14 | Mickey Kessler | Farmingdale, NJ | 7 | |
| 15 | Ken Adams | West Grove, PA | 8 | Maico |
| 16 | Goat Breker | Anaheim, CA | - 9 | |
| 17 | Tony Summey | Forest City, NC | 12 - 18 | |
| 18 | Frank Gallo | Macon, GA | 18 - 14 | |
| 19 | Wayne Boyer | Poway, CA | 15 - 17 | |
| 20 | Tony DiStefano | Bristol, PA | 13 | |
| 21 | Dan Waller | Truckee, CA | 16 - 19 | Maico |
| 22 | Paul Turner | La Selva, CA | - 15 | |
| 23 | Carlos Serrano | Tucson, AZ | - 16 | Maico |
| 24 | Scott Gillman | Santa Ana, CA | 20 | |