The Little 500 Race Winners:
 
1985 Alpha Epsilon Pi
1984 Cutters
1983 Acacia
1982 Phi Delta Theta
1981 Delta Chi
1980 Delta Chi
There are no records for the Mini 500, I had to find a photo on Google:

Image result for winner of indiana university mini 500 women's tricycle race 1980

Image result for winner of indiana university mini 500 women's tricycle race 1980

Image result for winner of indiana university mini 500 women's tricycle race 1980