40 Day Countdown
To celebrate the 40th Anniversary of AMA Motocross, we take you through all 40 years of the AMA Motocross Championship Series
Sat Apr 30 40 Day Countdown to AMA Motocross Opener: 1990 
Fri Apr 29 40 Day Countdown To AMA Motocross Opener: 1989 
Thu Apr 28 40 Day Countdown To AMA Motocross Opener: 1988 
Wed Apr 27 40 Day Countdown To AMA Motocross Opener: 1987 
Tue Apr 26 40 Day Countdown To AMA Motocross Opener: 1986 
Mon Apr 25 40 Day Countdown To AMA Motocross Opener: 1985 
Sun Apr 24 40 Day Countdown To AMA Motocross Opener: 1984 
Sat Apr 23 40 Day Countdown To AMA Motocross Opener: 1983 
Fri Apr 22 40 Day Countdown To AMA Motocross Opener: 1982 
Thu Apr 21 40 Day Countdown To AMA Motocross Opener: 1981 
Wed Apr 20 40 Day Countdown To AMA Motocross Opener: 1980 
Tue Apr 19 40 Day Countdown To AMA Motocross Opener: 1979 
Mon Apr 18 40 Day Countdown To AMA Motocross Opener: 1978 
Sun Apr 17 40 Day Countdown To AMA Motocross Opener: 1977 
Sat Apr 16 40 Day Countdown To AMA Motocross Opener: 1976 
Fri Apr 15 40 Day Countdown To AMA Motocross Opener: 1975 
Thu Apr 14 40 Day Countdown To AMA Motocross Opener: 1974 
Wed Apr 13 40 Day Countdown To AMA Motocross Opener: 1973 
Tue Apr 12 40 Day Countdown To AMA Motocross Opener: 1972 
