Well, hard to grasp, but the first HB1 prototype was built forty years ago.... This month's Motociclismo d'epoca has a real nice feature about that very first Bimota ever, the bike has survived in Switzerland and has been restored now.
plenty of nice anecdotes about the bike from the man himself, Tamburini. Essentially if he hadn't crashed his very own private CB750 at Misano, leaving him with an engine without a frame, maybe the whole Bimota history would have never have happened. The frame tubes were bent using the machine belonging to the original HVAC systems factory of Bianchi, Morri and Tambuirni.