There is something about the steady pulse of power from an air-cooled Twin Cam 103 engine that works its way into a rider and won’t let go. Once you’ve experienced it you understand. Nothing else in the world of motorized transportation could be as satisfying. There are perfectly rational explanations for this. The lightweight piston design and refined delivery of power. The strong driveline and bulletproof internal parts. The way engine and 6-Speed Cruise Drive transmission work flawlessly together to carry you down the highway at a relaxed, easy-riding rpm. But rational explanations never go far enough. What you feel when the power of this engine pulls you down the road toward the vanishing point is the legacy of the Flathead, Knucklehead, Panhead, Shovelhead, Evolution, Twin Cam 88 and Twin Cam 96 engines that came before. It’s something no ordinary engine can deliver.