Mine was a 1978 Yamaha DT, a duel sport. 125 cc's of raw power!
Of course I was only 11, and I was like 105 lbs. if that. So I learned to ride on the dirt, in the woods, on the back roads, you get the picture.
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After that I got a 86 YZ 125. That bike was the sh!t for a 15 year old.