HD® engines
Harleys first v-twin 1909-1911
F head 1911-1929
Flathead 1929-1936 shown 45 R 1932-36
Flathead 1942
knucklehead 1936-1947
Panhead 1948-1965
KHK K, KH Series 1952-1956
Ironhead 1957-1959
early Shovelhead 1966-1969
Shovelhead 1970-1984
Evolution 1984-1999
Evolution The Sportster 1986-present
Twin Cam 88 1999-2006
Revolution TM 2001-present
Twin Cam 96 2007-Present
