AC Sanctuary will build you a Kawasaki Z1 for $37,700

Japan probably has the most diverse custom motorcycle culture in the world. They like monkey bikes and mopeds and 110-cubic-inch Harleys and everything in between. And nothing is immune from the touch of the angle grinder, or the hiss of the metalflake spray gun. But there are a few companies that eschew this excess, and AC Sanctuary is one of them. Headquartered in Tokyo, it’s a chain of workshops that specializes in the retro superbikes of the 1970s—and Kawasakis in particular. This Kawasaki Z1 is the company’s latest creation, and it’ll set you back a dizzying $37,700 after taxes. So...