Mule Yamaha XS750 'Café-Tracker'

By David Edwards — Richard Pollock knows a thing or two about street-trackers. Doing business as Mule Motorcycles out of a converted two-car garage in suburban San Diego, he’s built about 100 trackers to date, and shows no signs of slowing down. In fact, now that his full-time job as an aerospace fabricator has morphed into part-time consultancy, he has more time than ever to devote to two-wheelers, including doing R&D and prototyping for Streetmaster, a small Southern California speed house for new Triumph Bonnevilles. Pollock’s bread and butter, though, are specials based on two powerplants: Harley-Davidson’s Evo Sportster V-twin...