13.5 Brushless DUO2 Motor. All motors from OHP are put on the dyno to make sure every tweak for performance is utilized. ROAR, BRL, and TOUR Approved. This is the new revised DUO2. The DUO 2 ROAR spec motors have been updated for increased performance. They still feature the ability to work with older sensorless speed controls and the newest sensored speed controls. Neo 2 magnets., Heavy duty ball bearings. 3 screw adjustable infinite timing. + 40 / -40 Meets ROAR/IFMAR specs.