Harley-Davidson engine timeline

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Harley-Davidson engines
Engine 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s
Light engines
S 1948–1952
One-cylinder engines
27.4" F-head 1903–1905
26.8" F-head 1906–1908
30" F-head 1909–1912
35" F-head 1913–1918
37" F-head 1921–1923
21" OHV 1926–1929
21" flathead 1926–1934
30.5" flathead 1929–1934
"Hummers" 1948–1966
Topper 1960–1965
Baja 100 1969–1972
Big twin engines
F-head (IOE) 1914–1929
Flathead 1930–1948 (until 1973 in the servicar models)
Knucklehead 1936–1947
Panhead 1948–1965
Shovelhead 1966–1984
Evolution 1984–1999
Twin Cam 1999–2016
Milwaukee-Eight 2017-
Sport engines
W (opposed) 1919–1923
XA 1942
D 1929–1931
R 1932–1936
W (V twin) 1937–1952
G (W engine) 1937–1973
WR 1941–1952
K 1952–1953
KH 1954–1956
KR 1952–1969
Ironhead 1957–1985
XR 1970–
Evolution 1986–
Water-cooled engines
Revolution 2002–
Revolution X 2013–

Big Twin(Stock) Engine Sizes:

  • Flathead 45ci (742cc)
  • Knucklehead 60ci (990cc) & 74ci (1208cc)
  • Panhead 60ci (990cc) & 74ci (1208cc)
  • Shovelhead 74ci (1208cc) & 82ci (1340cc)
  • Evolution 82ci (1340cc)
  • Twincam 88ci (1450cc) & 95ci (1550cc) (88/96ci bore 3.75in (95.25mm) & 4.00in stroke on 88ci (101.6 mm)
  • Twincam 96ci (1584cc) & 103ci (1690cc)(88/96ci bore 3.75in (95.25mm) & 4.38in stroke on 96ci (111.25 mm)
  • 2017-Milwaukee-Eight 107ci (1746cc) & 114ci (1868cc)
References