In fact, the manufacturer had an entire line of head-themed engines, including the Knucklehead, Panhead, and Shovelhead, with some featuring in the rarest Harley-Davidson motorcycles ever built.

Contrary to popular belief, the brand's iconic, influential and enduring V-twin engine initially landed with a resounding ...

Curious about Top Fuel Harley horsepower? Discover how much power these beasts pack and how fast they can really go.

Harley-Davidson's Twin Cam 103 and Milwaukee Eight 107 engines have their similarities, but there are some important ...

These ten Harley-Davidson engines are just as legendary as the models they powered - and they will run forever with the right maintenance.

Harley-Davidson isn't the oldest American marque – that distinction goes to Hendee/Indian – but it's the only one that has been in continual operation since its inception in 1903 up through ...