I agree Oldmech. My BCS 853 with 12 hp Lombardini has the new handlebar design with rubber isolation and there's no problem with vibrations.
Oldmech, I like the things you have designed, particularly the one wheel sulky. I'd like to build one of those one day. You are near Montreal, yes? (oui?). Every three or four years I go to Montreal on business. Maybe I will visit you to see the one wheel sulky and get dimensions to build one myself.
Bill in NC