Whether they are purpose-built Hooligan racers or street-legal trackers, these five builds represent the best of the breed. Here are five of our favorite Buell trackers featured on Bike EXIF. The XR1R by Bottpower When a race engineer decides to build a tracker, the results are bound to be surgical. From the Öhlins rear shock to the GPR silencer, the XR1R is a high-tech middle finger to the idea that trackers have to be primitive. By blending the aesthetic of a vintage dragster with the geometry of a modern flat tracker, Cheetah turned one of motorcycling’s greatest failures into a breathtaking success.