EXCLUSIVE FIRST LOOK: Harley-Davidson’s New XG750R Flat-Track Racer Can Harley’s new Street 750-based Flat Tracker replace the XR750? CW’s exclusive First Look of Harley-Davidson’s brand-new street-based XG750R AMA Pro Racing Flat Track racer. Learn more at CycleWorld.com. EXCLUSIVE FIRST LOOK: Harley-Davidson’s New XG750R Flat-Track Racer (image) Can Harley’s new Street 750-based Flat Tracker replace the…