The Harley-Davidson Dyna motorcycle line up includes models offering Big Twin performance in the form of an air cooled Twin Cam 96 Harley engine. Harley Dyna features include a high performance carbon fiber belt, unique tear drop air cleaner cover, exposed rear shocks, forward-mount or mid-mount controls (varies by model), 6-Speed Cruise Drive transmission, and more. Each  Dyna, offers something different, learn about each model's features and specs.