As you say Dan, a skipping sensation is what it must be, not actual jumping of teeth or coupling rubbers. I suspect some sort of winding up and release suddenly when traction is lost momentarily. Can you tell me which type of coupling Centa used and where to find the picture? I would be most grateful.
I think that my chain drive conversion has just proved what everyone seems to think - that it was not the belt. The best outcomes are reduced noise and low cost future replacements without the need to take the swinging arm out.
Thanks for your comments, Phil.
