Harley-Davidson engine timeline

Harley-Davidson engines are a line of engines manufactured since 1903 in Milwaukee, Wisconsin by the Harley-Davidson company for use in its motorcycles. Now made in various factories in York, Pennsylvania; Milwaukee, Wisconsin; Kansas City, Missouri (closing); Manaus, Brazil; and Bawal, India.

Engine timeline

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–
Fluid (water)-cooled engines
Revolution																																																																	2002–
Revolution X																																																																	2013–

Big Twin (Stock) Engine Sizes:

• Flathead 45ci (737cc)
• Knucklehead 60ci (983cc) & 74ci (1212cc)
• Panhead 60ci (983cc) & 74ci (1212cc)
• Shovelhead 74ci (1212cc) & 82ci (1343cc)
• Evolution 82ci (1343cc)
• Twincam 88ci (1442cc) & 95ci (1556cc) (88/96ci bore 3.75in (95.25mm) & 4.00in stroke on 88ci (101.6 mm)
• Twincam 96ci (1573cc) & 103ci (1687cc)(88/96ci bore 3.75in (95.25mm) & 4.38in stroke on 96ci (111.25 mm)
• 2017-Milwaukee-Eight 107ci (1746cc) & 114ci (1868cc) & 117ci (1923cc)

References

• Hornsby, Andy. "A Potted History of Harley-Davidson: Part 1 1903-1954". Crewe, UK: American-V. Archived from the original on 2011-02-11. Retrieved 2011-04-04.
• Mitchell, D., ed. (1997). Harley-Davidson Chronicle - An American Original. Publications International Limited. ISBN 0-7853-2514-X.
• Henshaw, Peter, Kerr, Ian, "The Encyclopedia of the Harley-Davidson", 2001, Chartwell Books, Inc., ISBN 0-7858-1274-1