To say that Winston Yeh likes the color black would be a gross understatement. The man behind Taiwan's Rough Crafts has a sense of style that would make Johnny Cash's wardrobe blush, and seldom builds a custom motorcycle that isn't swathed in various shades of black. We checked; a mere 10 percent of the Rough Crafts bikes featured on our pages buck this trend. So when Mr. Yeh does deviate from this formula, it's usually for a good reason—like a special request from a client. “He wanted an...