| 23 | Gary Shipley | Sunshine Speedway | 500MX | August 27, 1978 |
| 19 | Rick Anderson | Sunshine Speedway | 125MX | August 27, 1978 |
| 25 | Gary Shipley | Metrolina Speedway Park | 500MX | August 20, 1978 |
| 26 | Rick Anderson | Metrolina Speedway Park | 125MX | August 20, 1978 |
| 15 | Jim Turner | Agency Motocross | 500MX | August 13, 1978 |
| 21 | Gary Shipley | Agency Motocross | 500MX | August 13, 1978 |
| 15 | Goat Breker | Pine Top Motorcycle Park | 500MX | August 6, 1978 |
| 19 | Jim Turner | Pine Top Motorcycle Park | 500MX | August 6, 1978 |
| 23 | Jim Turner | Atlanta International Raceway | 500MX | July 16, 1978 |
| 25 | Charles Halcomb | Atlanta International Raceway | 125MX | July 16, 1978 |
| 2 | Chuck Sun | High Point Raceway | 250MX | July 9, 1978 |
| 19 | Mike Loeffler | High Point Raceway | 250MX | July 9, 1978 |
| 7 | Jim Turner | High Point Raceway | 500MX | July 9, 1978 |
| 20 | Goat Breker | RedBud Track 'n Trail | 500MX | July 2, 1978 |
| 5 | Chuck Sun | RedBud Track 'n Trail | 250MX | July 2, 1978 |
| 12 | Mike Loeffler | RedBud Track 'n Trail | 250MX | July 2, 1978 |
| 13 | Marty Moates | Los Angeles | 250SX | June 24, 1978 |
| 13 | Jim Turner | Cycle World USA | 500MX | June 18, 1978 |
| 2 | Chuck Sun | Cycle World USA | 250MX | June 18, 1978 |
| 14 | Mike Loeffler | Cycle World USA | 250MX | June 18, 1978 |
| 12 | Jim Turner | Sears Point International Raceway | 500MX | June 11, 1978 |
| 16 | Goat Breker | Sears Point International Raceway | 500MX | June 11, 1978 |
| 22 | Paul Turner | Sears Point International Raceway | 500MX | June 11, 1978 |
| 4 | Chuck Sun | Sears Point International Raceway | 250MX | June 11, 1978 |
| 12 | Mike Loeffler | Sears Point International Raceway | 250MX | June 11, 1978 |
| 4 | Chuck Sun | Lake Whitney Cycle Ranch | 250MX | May 28, 1978 |
| 25 | Mike Loeffler | Lake Whitney Cycle Ranch | 250MX | May 28, 1978 |
| 6 | Chuck Sun | New Orleans | 250SX | May 20, 1978 |
| 9 | Marty Moates | New Orleans | 250SX | May 20, 1978 |
| 6 | Chuck Sun | Pittsburgh | 250SX | May 13, 1978 |
| 11 | Marty Moates | Pittsburgh | 250SX | May 13, 1978 |
| 4 | Chuck Sun | Moto-X 338 | 250MX | May 7, 1978 |
| 19 | Mike Loeffler | Moto-X 338 | 250MX | May 7, 1978 |
| 18 | Rick Anderson | Moto-X 338 | 125MX | May 7, 1978 |
| 10 | Chuck Sun | Omaha Moto Park | 250MX | April 30, 1978 |
| 25 | Rick Anderson | Omaha Moto Park | 125MX | April 30, 1978 |
| 10 | Chuck Sun | Rio Bravo MX Park | 250MX | April 23, 1978 |
| 22 | Rick Anderson | Rio Bravo MX Park | 125MX | April 23, 1978 |
| 3 | Chuck Sun | Racing World | 250MX | April 16, 1978 |
| 4 | Chuck Sun | Hangtown Motocross Classic | 250MX | April 9, 1978 |
| 17 | Marty Moates | Pontiac 2 | 250SX | April 2, 1978 |
| 18 | Chuck Sun | Pontiac 2 | 250SX | April 2, 1978 |
| 20 | Chuck Sun | Pontiac 1 | 250SX | April 1, 1978 |
| 4 | Chuck Sun | Houston 2 | 250SX | March 18, 1978 |
| 10 | Chuck Sun | Daytona | 250SX | March 11, 1978 |
| 19 | Marty Moates | Atlanta | 250SX | March 4, 1978 |
