I found these videos on youtube. I've seen other similar videos of the these events in the past, and although these particular videos are kind of Zundapp-centric, they revealed footage of the races that I've never seen. Camerino and the Isle of Man events looked absolutely brutal! I'm simply amazed at what the little 100 cc bikes (all makes) could do.
It's interesting to see the evolution and progression of suspension of these bikes in the German ISDT in 1976. Interestingly enough, there were parts of the German ISDT that looked brutal as well.
Looking at these and other vintage ISDT events I'm in awe of the riders who raced these bikes.
Well enough commentary already -- here's the links. Unfortunately, the commentary is all German -- but it doesn't really matter because it's pretty good footage IMHO. Enjoy.
http://www.youtube.com/watch?v=nmw45gwXZnA
http://www.youtube.com/watch?v=trQWFfZAZTo
http://www.youtube.com/watch?v=ivY86cWA98Q
http://www.youtube.com/watch?v=c2uOQMvJXTI
Regards,
JC