| 1 | Gaylon Mosier | Anaheim | 250SX | November 11, 1978 |
| 4 | Jim Weinert | Anaheim | 250SX | November 11, 1978 |
| 16 | Steve Stackable | Anaheim | 250SX | November 11, 1978 |
| 14 | Steve Stackable | Sunshine Speedway | 500MX | August 27, 1978 |
| 24 | Mark Hutcheson | Sunshine Speedway | 500MX | August 27, 1978 |
| 8 | Steve Stackable | Metrolina Speedway Park | 500MX | August 20, 1978 |
| 1 | Gaylon Mosier | Metrolina Speedway Park | 125MX | August 20, 1978 |
| 5 | Steve Stackable | Agency Motocross | 500MX | August 13, 1978 |
| 4 | Gaylon Mosier | Agency Motocross | 125MX | August 13, 1978 |
| 24 | Charles Fricke | Agency Motocross | 125MX | August 13, 1978 |
| 7 | Steve Stackable | Pine Top Motorcycle Park | 500MX | August 6, 1978 |
| 10 | Gaylon Mosier | Pine Top Motorcycle Park | 125MX | August 6, 1978 |
| 6 | Steve Stackable | Atlanta International Raceway | 500MX | July 16, 1978 |
| 2 | Gaylon Mosier | Atlanta International Raceway | 125MX | July 16, 1978 |
| 14 | Jim Weinert | High Point Raceway | 250MX | July 9, 1978 |
| 4 | Steve Stackable | High Point Raceway | 500MX | July 9, 1978 |
| 8 | Steve Stackable | RedBud Track 'n Trail | 500MX | July 2, 1978 |
| 12 | Gaylon Mosier | Los Angeles | 250SX | June 24, 1978 |
| 19 | Steve Stackable | Los Angeles | 250SX | June 24, 1978 |
| 15 | Steve Stackable | Cycle World USA | 500MX | June 18, 1978 |
| 13 | Jim Weinert | Cycle World USA | 250MX | June 18, 1978 |
| 19 | Charles Cooper | Cycle World USA | 250MX | June 18, 1978 |
| 13 | Steve Stackable | Sears Point International Raceway | 500MX | June 11, 1978 |
| 2 | Jim Weinert | Sears Point International Raceway | 250MX | June 11, 1978 |
| 5 | Steve Stackable | Lake Whitney Cycle Ranch | 500MX | May 28, 1978 |
| 6 | Jim Weinert | Lake Whitney Cycle Ranch | 250MX | May 28, 1978 |
| 16 | Charles Cooper | Lake Whitney Cycle Ranch | 250MX | May 28, 1978 |
| 15 | Gaylon Mosier | New Orleans | 250SX | May 20, 1978 |
| 19 | Jim Weinert | New Orleans | 250SX | May 20, 1978 |
| 15 | Jim Weinert | Pittsburgh | 250SX | May 13, 1978 |
| 18 | Steve Stackable | Pittsburgh | 250SX | May 13, 1978 |
| 17 | Jim Weinert | Moto-X 338 | 250MX | May 7, 1978 |
| 2 | Gaylon Mosier | Moto-X 338 | 125MX | May 7, 1978 |
| 14 | Jim Weinert | Omaha Moto Park | 250MX | April 30, 1978 |
| 19 | Charles Cooper | Omaha Moto Park | 250MX | April 30, 1978 |
| 3 | Gaylon Mosier | Omaha Moto Park | 125MX | April 30, 1978 |
| 20 | Danny Weir | Omaha Moto Park | 125MX | April 30, 1978 |
| 4 | Jim Weinert | Rio Bravo MX Park | 250MX | April 23, 1978 |
| 9 | Gaylon Mosier | Rio Bravo MX Park | 125MX | April 23, 1978 |
| 5 | Jim Weinert | Racing World | 250MX | April 16, 1978 |
| 16 | Stephen Bauer | Racing World | 250MX | April 16, 1978 |
| 7 | Gaylon Mosier | Racing World | 125MX | April 16, 1978 |
| 6 | Jim Weinert | Hangtown Motocross Classic | 250MX | April 9, 1978 |
| 19 | Stephen Bauer | Hangtown Motocross Classic | 250MX | April 9, 1978 |
| 5 | Gaylon Mosier | Hangtown Motocross Classic | 125MX | April 9, 1978 |
| 19 | Steve Stackable | Pontiac 2 | 250SX | April 2, 1978 |
| 10 | Jim Weinert | Pontiac 1 | 250SX | April 1, 1978 |
| 9 | Gaylon Mosier | Houston 1 | 250SX | March 17, 1978 |
| 5 | Jim Weinert | Daytona | 250SX | March 11, 1978 |
| 11 | Gaylon Mosier | Daytona | 250SX | March 11, 1978 |
| 5 | Gaylon Mosier | Seattle | 250SX | February 18, 1978 |
| 9 | Jim Weinert | Seattle | 250SX | February 18, 1978 |
