I appreciate all the input on what I recognize is a slightly wacky topic.
Like Tom Waits said when he described a ricochet bullet penetrating the testicles of a civil war soldier before impregnating the ovaries of a nearby woman, it is a form of sex but is probably not for everyone...........
Back to the Rickman. A 750 engine, mounted upright, no isolastics, 10.5 to 1 compression. Assuming the engine was balanced correctly, how horrible would the vibration be??
Part of the problem, if there is one, is the bike has such a cool factor.
I can't post a photo, but the link to the bike below looks very similar, with the main difference being that on the bike I am dealing with the rear wheel/brake is from a Manx rather than a disk hub.
Norton Rickman Metisse race bike. 1973. 750cc. Frame No- 1309R Engine No- N15CS/120224 Part o... in 2 Day Sale of Vintage and Classic Mo (29 Sep 2023)
www.hjpugh.com