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| 250cc SX |
| 2003 | Ricky Carmichael | Honda |
| 2002 | Ricky Carmichael | Honda |
| 1996 | Jeremy McGrath | Honda |
| 1995 | Jeremy McGrath | Honda |
| 1994 | Jeremy McGrath | Honda |
| 1993 | Jeremy McGrath | Honda |
| 1992 | Jeff Stanton | Honda |
| 1991 | Jean-Michel Bayle | Honda |
| 1990 | Jeff Stanton | Honda |
| 1989 | Jeff Stanton | Honda |
| 1988 | Rick Johnson | Honda |
| 1987 | Jeff Ward | Kawasaki |
| 1986 | Rick Johnson | Honda |
| 1985 | Jeff Ward | Kawasaki |
| 1984 | Johnny O'Mara | Honda |
| 1983 | David Bailey | Honda |
| 1982 | Donnie Hansen | Honda |
| 1981 | Mark Barnett | Suzuki |
| 1980 | Mike Bell | Yamaha |
| 1977 | Jim Weinert | Kawasaki |
| 1976 | Bob Hannah | Yamaha |
|
| 250cc MX |
| 2003 | Ricky Carmichael | Honda |
| 2002 | Ricky Carmichael | Honda |
| 1999 | Greg Albertyn | Suzuki |
| 1995 | Jeremy McGrath | Honda |
| 1992 | Jeff Stanton | Honda |
| 1991 | Jean-Michel Bayle | Honda |
| 1990 | Jeff Stanton | Honda |
| 1989 | Jeff Stanton | Honda |
| 1988 | Jeff Ward | Kawasaki |
| 1987 | Rick Johnson | Honda |
| 1986 | Rick Johnson | Honda |
| 1985 | Jeff Ward | Kawasaki |
| 1984 | Rick Johnson | Yamaha |
| 1983 | David Bailey | Honda |
| 1982 | Donnie Hansen | Honda |
| 1981 | Kent Howerton | Suzuki |
| 1980 | Kent Howerton | Suzuki |
| 1977 | Tony DiStefano | Suzuki |
| 1976 | Tony DiStefano | Suzuki |
| 1975 | Tony DiStefano | Suzuki |
| 1974 | Gary Jones | Honda |
| 1973 | Gary Jones | Honda |
| 1972 | Gary Jones | Yamaha |
|
| 125cc MX |
| 2003 | Grant Langston | KTM |
| 2000 | Travis Pastrana | Suzuki |
| 1996 | Steve Lamson | Honda |
| 1995 | Steve Lamson | Honda |
| 1994 | Doug Henry | Honda |
| 1993 | Doug Henry | Honda |
| 1992 | Jeff Emig | Yamaha |
| 1991 | Mike Keidrowski | Kawasaki |
| 1990 | Guy Cooper | Suzuki |
| 1989 | Mike Keidrowski | Honda |
| 1988 | George Holland | Suzuki |
| 1987 | Micky Dymond | Honda |
| 1986 | Micky Dymond | Honda |
| 1985 | Ron Lechien | Honda |
| 1984 | Jeff Ward | Kawasaki |
| 1983 | Johhny O'Mara | Honda |
| 1982 | Mark Barnett | Suzuki |
| 1981 | Mark Barnett | Suzuki |
| 1980 | Mark Barnett | Suzuki |
| 1979 | Broc Glover | Yamaha |
| 1978 | Broc Glover | Yamaha |
| 1976 | Bob Hannah | Yamaha |
|
| 125cc WSX |
| 2001 | Ernesto Fonseca | Yamaha |
| 1995 | Damon Huffman | Suzuki |
| 1994 | Damon Huffman | Suzuki |
| 1990 | Ty Davis | Honda |
| 1989 | Jeff Matiasevich | Kawasaki |
| 1988 | Jeff Matiasevich | Kawasaki |
| 1987 | Willie Surratt | Suzuki |
| 1986 | Donny Schmit | Kawasaki |
| 1985 | Bobby Moore | Suzuki |
|
| 125 ESX |
| 2002 | Chad Reed | Yamaha |
| 2000 | Stephane Roncada | Yamaha |
| 1999 | Ernesto Fonseca | Yamaha |
| 1997 | Tim Ferry | Suzuki |
| 1994 | Ezra Lusk | Suzuki |
| 1993 | Doug Henry | Yamaha |
| 1992 | Brian Swink | Suzuki |
| 1990 | Denny Stephenson | Suzuki |
| 1989 | Damon Bradshaw | Yamaha |
| 1988 | Todd DeHoop | Suzuki |
| 1987 | Ron Tichenor | Suzuki |
| 1986 | Keith Turpin | Honda |
| 1985 | Eddie Warren | Kawasaki |
|
| 500cc MX |
| 1991 | Jean-Michel Bayle | Honda |
| 1990 | Jeff Ward | Kawasaki |
| 1989 | Jeff Ward | Kawasaki |
| 1988 | Rick Johnson | Honda |
| 1987 | Rick Johnson | Honda |
| 1986 | David Bailey | Honda |
| 1984 | David Bailey | Honda |
| 1982 | Darrell Shultz | Honda |
| 1980 | Chuck Sun | Honda |
| 1979 | Danny LaPorte | Suzuki |
| 1977 | Marty Smith | Honda |
| 1976 | Kent Howerton | Husqvarna |
| 1975 | Jim Weinert | Yamaha |
| 1974 | Jim Weinert | Kawasaki |
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