I cuttently have a pair of 1970 ct70's, One stocker I restored as a kid and one thats a restomod. Has a 13hp 125cc 4spd motor in it, the thing will hold a 3rd gear wheelie. I dust em off and take em around the block every year or so, but when I was a kid I put 6000 miles on the stocker in 1 summer at my grandparents cabin. I love those little bikes, I buy em anytime I see em for a good price.
I learned how to ride on a 74 kawasaki KE100, then had a 74 suzuki TS185. Im lookin for a SL175 or an old elsinore to restore in the future. Vintage motocross bikes will be big money some day