To answer the question of what trials we were riding, back in the 1960's there were a number of organized woods "races" going on in New England. Typically, they ran 5, 10 and 25 miles and were best-time-of-day events, limited to 20 riders per group, tops. Various classes, depending on displacement, with lots of Bultacos, the occasional Jawa and Ossa, a few Greeves and the appearance of a seemingly indestructible, quite fast and beautiful handling set of bikes from John Penton - I think his best was the "Penton 6-day", created to compete in the European 6-day trials. Yamaha, Kawasaki and Honda weren't yet competitive in New England back then, but coming on. My brother and I started on Panonia bikes (Hungarian) and then switched to Greeves, him on a 360 Griffon and smaller, lighter me on a 250 Internationale.
Anyway, our races were a combo of woods, deep woods, fields and dirt roads. With typical gearing on the smaller bikes like ours, 50-55 was absolute top end. On the 500 Yankee bike, however, Ray could top out just over 100. It was a 6-speed and designed for the Euro circuit (european riders were nuts). In America, to comply with the 5-speed-max rule, we just locked out 1st gear and took off in second. That bike was a brute. To show the crazier rider between us two, Ray eventually broke his wrist, his forearm, his collarbone and his lower left leg. I broke.....Nothing.
There weren't many bikes in the 500cc class back then. The typical big bikes then were too heavy to handle well. By the early 70's we were both married and that ended our motorcycle racing careers.