Low flyer: Yamaha XS650 by Clutch Custom

We’ve probably used every superlative in the book to describe the Clutch Custom style by now. Propriétaire Willie Knoll builds bikes that we just can’t tear our eyes away from. As we’ve come to expect from the Paris-based builder, this XS650 is low-key and refined. But it’s stacked with hand-made bits and pieces—details that M. Knoll prides himself on, but claims won’t be noticed at first glance. For starters, the XS650 now packs an extra wallop thanks to an engine rebuild with a 750cc big-bore kit. Helping the extra cubic centimeters do their job are a pair of Dell'Orto carbs,...