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.

Harley-Davidson motorcycles are pretty famous for their big, chugging, powerful engine sounds. Here are the most aurally ...

VINTAGE - There are 5 condition grades for Harley-Davidson. There are many options that may affect the final value on Harley-Davidson motorcycles such as multi-speed transmissions, clutch assembly, ...