Here is my twopenny worth - I not sure about the regulator mounting, I am sure my Ninety Plus was not mounted like that, from memory of 40 odd years ago I thought the regulator was mounted on lugs welded to the rear tank support. The Saddle cover looks definitely not standard. What about the rims, they are definitely not original Dunlops, more like akront or borrani, no little bead at the outside top of the flange as per the original Dunlops. I agree with Eddie about the pipes & silencers and one other thing, originally was there not a plastic/rubber beading around the front number plate. I remember the new one I brought from Greame Brown in the 1960's certainly had it. It may be an optical illusion but is the tachometer cable run in a strange manner, I know it has a handlebar mounted instrument, but still. Having picked holes in a nice motorcycle, does it qualify for the best 90+ probably not. May I wish one and all a good Christmas & New Year
Cheers SteveL