At the heart of every great Harley-Davidson motorcycle is the engine -- here we've got 10 of the greatest of all time.

Harley-Davidson was founded over 120 years ago and has been manufacturing motorcycles in America since 1903. The company's first motorcycle, the Model 1, was designed in 1901 and produced until 1904.

In the middle of the 1980s, legendary motorcycle manufacturer Harley-Davidson was in a full blown crisis: numbers were down, morale was nonexistent, and innovation was a pipe dream. AMF had bought out ...

RAPID CITY, S.D. — The 25 th annual Black Hills Model Engine Expo was held at the Fine Arts Building of the Central States ...