About Harley-Davidson V-Rod Motorcycles - The Harley Davidson V-Rod was introduced in 2001 with the intention of competing in the American and Japanese muscle bike market. Developed jointly with Porsche, the Harley Davidson V-Rod Revolution engine incorporated fuel injection, liquid cooling and overhead cams. This was a first for Harley Davidson. Visually distinct from other Harleys, the Harley Davidson V-Rod can be identified by the 60 degree V-Twin engine, the radiator, and the placement of the fuel tank, which is located under the seat. The Harley Davidson V-Rod is the platform from which Harley Davidson builds its competition drag racing machines. In 2008, changes to the Harley Davidson V-Rod included anti-lock braking, a slipper clutch and an increase in engine displacement. There have been many models of the Harley Davidson V-Rod, including the V-Rod Muscle and the Night Rod Special.