On-road, Off-road, All Roads It all starts in the engine room, where the XRâ„¢'s potent, 644 cc OHC powerplant uses Honda's patented Radial Four-Valve Combustion Chamber (RFVC) to put out huge torque and power. From there, a gear-driven counterbalancer minimizes vibrations, while a light, rigid chassis and long-travel suspension soak up the bumps and deliver superb handling on pavement and off. Handy electric starting simply makes it all that much easier.