1990 AMA Pro Motocross Championship Broome-Tioga Sports Center: 500MX Results
September 2, 1990
- 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 | | Sherwood, MI | 2 - 1 | Honda |
| 2 | Jeff Ward | Mission Viejo, CA | 1 - 2 | Kawasaki |
| 3 | Johnny O'Mara | Van Nuys, CA | 3 - 3 | Kawasaki |
| 4 | | Pontiac, MI | 5 - 4 | Kawasaki |
| 5 | | Columbia, CT | 6 - 5 | Kawasaki |
| 6 | | North Canton, OH | 9 - 7 | Honda |
| 7 | | Hesperia, CA | 7 - 9 | Honda |
| 8 | | Cherry Valley, CA | 11 - 6 | Yamaha |
| 9 | | Depew, NY | 8 - 12 | Kawasaki |
| 10 | | Kempton, PA | 12 - 10 | Kawasaki |
| 11 | Rick Johnson | El Cajon, CA | 4 - 33 | Honda |
| 12 | | Capistrano Beach, CA | 13 - 13 | Honda |
| 13 | | Felton, CA | 29 - 8 | Honda |
| 14 | | Vineland, NJ | 15 - 15 | Honda |
| 15 | | Wappingers Falls, NY | 10 - 35 | Honda |
| 16 | | Ketchum, ID | 39 - 11 | Honda |
| 17 | | Colts Neck, NJ | 18 - 16 | Kawasaki |
| 18 | | Duncansville, PA | 17 - 17 | Honda |
| 19 | | Tallahassee, FL | 21 - 14 | Yamaha |
| 20 | | Sylmar, CA | 14 - 38 | Honda |
| 21 | | Pembroke, MA | 16 - 34 | KTM |
| 22 | | Baltimore, MD | 19 - 19 | Kawasaki |
| 23 | | Dexter, MI | 24 - 18 | Kawasaki |
| 24 | | Hightstown, NJ | 25 - 20 | Yamaha |
| 25 | | East Hampton, CT | 20 - 23 | Kawasaki |


