A friend had a '71 H1. I'm pretty sure the H1 bike was the first stock model to be able to kill you just for holding the throttle open, bikes that will wheelie over and land on top of you that way are a dime a dozen now (OK, a bit more expensive) but back then this was pretty unusual. The exhaust tuning caught at about 6000 RPM and horsepower suddenly increased - it felt like another engine had started. At least the 71 had a disk brake unlike the first "widowmaker" model. Still had the rubber frame and fish oil shocks though.
One day his bike stopped working. I remember the dealer (small local shop) asking him to come over, I drove him there. Frank Mrazec, the dealer, just said "Hi, it's lunch time, lets go eat - I'll give you a ride home" so I left. It turns out he wanted a few beers in my friend before he told him what a new CDI system was going to cost.