List of motocross riders
Name Seasons World Championships National Championships Races Wins
Donny Schmit 1987-1995 125cc- 1990 , 250cc- 1992 AMA 125cc West SX - 1986 - 15
Darrell Schultz 1978-1982 - AMA 500cc- 1982 - -
Tommy Searle 2006-present - - - -
Gary Semics 1973-1981 , 1987 , 1990 - AMA 500cc SX - 1974 - -
Shaun Simpson - - - - -
Joël Smets 1989-2005 500cc- 1995 , 1997-1998 , 2000 , 650cc- 2003 - - 57
Jeff Smith 1955-1970 500cc- 1964-1965 - - 30
Marty Smith 1974-1982 - AMA 125cc- 1974 , 1975 AMA 500cc- 1977 - -
Steve Stackable 1974-1981 - AMA 500cc SX - 1975 - -
Jeff Stanton 1986-1993 - AMA 250cc- 1989 , 1990 , 1992 AMA SX-1989 , 1990 , 1992 - -
Rex Staten 1974 , 1976-1981 , 1990 1981 Four Stroke World Champion - - -
James Stewart Jr 2002-present SX- 2006 , 2007 , 2009 AMA 125cc- 2002 , 2004 AMA SX- 2007 , 2009 AMA Motocross- 2008 - -
Brian Stonebridge 1950-1959 - - - 6
David Strijbos 1985-1994 125cc- 1986 - - 27
Kevin Strijbos 2000-present - - - 5
Chuck Sun 1976-1983 - AMA 500cc- 1980 - -
Torao Suzuki - - All Japan 250cc- 1972 All-Japan 125cc- 1973 , 1976 - 4
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This is a partial list of notable current and former motocross riders, many of whom have competed in the World Championships, National Championships, and supercross competitions.