While the olden models had SOHC engines and five-speed transmissions, the new CB650F has a DOHC mill and a six-speed gearbox. And the performance is night-and-day, Jekyll-and-Hyde different. Although competent in their time, the original snaky-pipe Super Sports weren’t world-beaters in stock form, while the CB650F gets with it in a much more, well, ¡Ay, caramba! manner. Other reasons to go new are EFI, better conventional suspension, and triple disc brakes (with ABS optional for $500). And guess what? Both the 1975 CB550F and 2018 CB650F weigh a claimed 454 pounds wet. We told you they shared their souls.