I think that's the guy who made a V-12 out of 2 of the Kawasaki 6-cylinder bikes they put out about 20 years ago. KZ1300?
He also builds 5 cylinder versions of the 2-stroke triples. How about a 1250cc 5 cylinder 2-stroke? I have seen the website where his stuff is shown. AMAZING quality of work! The V-12 looks absolutely factory!!