1978 AMA Pro Motocross Championship Pine Top Motorcycle Park: 500MX Results
August 6, 1978
- Monster Energy AMA Supercross Championship
- AMA Pro Motocross Championship
- SuperMotocross World Championship
- FIM Motocross World Championship
- Progressive GNCC Racing
- Motocross of Nations
- FIM World Supercross Championship
- Australian Supercross Championship
- Women's Motocross Championship
- Monster Energy Cup
500MX Results
| Rider | Hometown | Motos | Bike | |
|---|---|---|---|---|
| 1 | | Sandy, OR | 1 - 1 | Yamaha |
| 2 | | Fontana, CA | 4 - 2 | Yamaha |
| 3 | | Orangevale, CA | 3 - 5 | Suzuki |
| 4 | Marty Smith | San Diego, CA | 2 - 9 | Honda |
| 5 | | San Diego, CA | 7 - 4 | Honda |
| 6 | | Farmingdale, NJ | 5 - 6 | Yamaha |
| 7 | | Austin, TX | 11 - 8 | Kawasaki |
| 8 | | Yucca Valley, CA | 13 - 7 | Suzuki |
| 9 | | Winston Salem, NC | - 3 | Suzuki |
| 10 | | Lisbon, OH | 6 | Can-am |
| 11 | | Poway, CA | 16 - 13 | Suzuki |
| 12 | | Bristol, PA | 8 | Suzuki |
| 13 | | Girard, PA | 14 - 16 | Maico |
| 14 | | Medina, OH | 9 | Maico |
| 15 | | Anaheim, CA | - 10 | Husqvarna |
| 16 | | Lake Hughes, CA | 10 | Maico |
| 17 | | Cheektowaga, NY | - 11 | KTM |
| 18 | | Reno, OH | - 12 | Maico |
| 19 | | Woodside, CA | 12 | Husqvarna |
| 20 | | Macon, GA | - 14 | KTM |
| 21 | | Hightstown, NJ | - 15 | |
| 22 | | Rome, GA | 17 - 19 | |
| 23 | | Harrisburg, PA | 15 | |
| 24 | | Hagerstown, MD | - 17 | Suzuki |
| 25 | | Churchville, PA | - 18 | Maico |
| 26 | | Brandywine, MD | 18 | Bultaco |
| 27 | | Albuquerque, NM | 20 - 20 | KTM |
| 28 | | East Stroudsburg, PA | 19 |


