The 1900-1920s Harley-Davidson Motorcycles Channel features some of the earliest models around. Check out vintage Harleys at HowStuffWorks.
1909 Harley-Davidson V-Twin
The 1909 Harley-Davidson V-twin was Harley's first production V-twin. It was withdrawn from the market for a year and when it returned for 1911 it had mechanical intake valves and a belt-tensioning device. Learn about this classic Harley-Davidson.