2014 Can-Am Spyder RT-S SM6, PASSANGER BACK REST!!! ADJUSTABLE WINDSHIELD!!! FLOOR BOARDS!!! ABS BRAKES!!! PARKING BRAKE!!! AM/FM RADIO!!! It was clear at the intro of the 2014 Can-Am Spyder RT-S that the machine was substantially different from its predecessor. The original RT-S used a 998cc Rotax V-twin that was derived from an Aprilia sportbike engine, and though our 10,000-mile test showed that 2010 Spyder to be enjoyable to ride, it suffered from relatively short maintenance intervals, so-so fuel economy and handling that was more minivan-like than sports-car like.