I had a bunch of variants starting with a blue 1974 atc90.... Did my paper route on it with a custom built rack on back. When fully loaded with newpapers early in the route, I had to sit way forward to keep the front end down enough to steer.
I mainly rode mini and dirt bikes most of the time, but the 3 wheelers were fun in the winter. When I was about 14 or 15, I bought a nearly new 1981 ATC250 from my summer job boss who was scared of it. I ended up face planting by coming off the back doing a 5th gear wide open wheelie on a paved road (back brake foot was on the rear hand hold bar... so no saving it via rear brake action). I was doing probably 50-55 mph and had no helmet or riding gear on.... I was a mess with road rash but never went to the hospital.... My parents made me return it to my boss.
