Yamaha SR400 USA model. Yamaha have re-released the air-cooled single—kick-start and all—and the custom world is eating it up. Jeff Palhegyi snapped up one of the first USA models, turning it into a timeless scrambler in just eight days with simple, but well-judged, modifications. The SR now sports an aluminum Omega Racer swingarm, custom Racetech shocks and Heidenau dual-sport tires. It’s a fitting homage to Yamaha’s legendary TT500—right down to the iconic “TT” logo on the tank.