Harley experienced changes in ownership in the ‘60s, going public in 1965 and eventually merging with American Machine and Foundry (AMF) in 1969. A decline in fortunes saw AMF sell its stake back to current ownership, which included members of the founding families, in the early ‘80s. The Davidson family’s involvement in the day-to-day running of H-D continues, with direct descendent Willie G. Davidson serving as President of Styling.
One constant of Harley-Davidson, since almost the very beginning, has been the use of 45-degree air-cooled V-Twins. Popular Harley powerplants and their service timelines are seen below, courtesy of the Harley-Davidson archives.
Twin Cam 103 1999-2006
Twin Cam 96 2007-Present
Twin Cam 88B (counter balanced version of the Twin Cam 88) 2000-2006
Twin Cam 88 2000-2006
Evolution 1340cc 1984-1999
Flathead 1930 -1948
F-Head, aka JD, pocket valve and IOE (intake over exhaust) 1914-1929 (1000cc), and 1922-1929 (1200cc)
Revolution Engine 2001-Present
Flathead K Model 1952-1956