“I love two-strokes,” William Ellis declares. That's partly why the Welles-ley, Mass., resident bought this gray DKW 93 in 2002. He might be in the minority now, but 50 years ago, two-strokes were ...

DKW was the world's biggest motorcycle manufacturer in the 1920s. The Super Sport 600 was DKW's culmination: its heaviest, most powerful machine. The signature clatter says: this is a 2-stroke engine.