What I can't understand about Ducati Cup comments, is the rules are the same for all manufacturers. So if there is an advantage in building a twin, then the Japenese manufacturers could do so. Remember Ducati do have a 4 cylinder road bike that they could homologate. Aprilia didn't make much of it when they entered a twin, and Honda had a hard time beating Ducati when they built one.

Ducati built a 4 cyclinder GP bike presumably becase they thought it the format most likely to be successful. The results speak for themselves. I suspect that what ever the rules Ducati would still be competitive. I also suspect that Bayliss is an exceptional rider who would also be a front runner on a 4