Cycle World Flashback: 1971 Yamaha JTI Mini Enduro Long before the Honda XR75, Yamaha had the Mini Enduro.

It's a dangerous place, the Cycle World library: You go in there looking for something specific—say, a photo of a Yamaha RD400 crankshaft—and you end up disappearing for a couple of hours going through file after fascinating file, many chock-full with vintage black-and-white photos of bikes we...