A few years ago I went up to Charnwoods to test ride one of their diesel Enfields and it was an interesting experience. Having said that, once 55mph was reached there was no further acceleration whatever you did.
I pestered Jim for ages to see if he was going to try one of these bikes with a light chair and how it would perform. He didn't seem to get around to it though.
What prompted me to drop in today was reading an old Cathcart article on the Boccardo (sp?). I do have a soft spot for very frugal motorcycles
Cheers
GC