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The Panhead engine replaced the Knucklehead engine in 1948 and was manufactured until 1965 when it was replaced by the Shovelhead. As Harley-Davidson engines evolved, the distinctive shape of the rocker covers led Harley enthusiasts to recognise an engine simply by identifying the head, with names such as "Flathead", "Knucklehead" "Panhead ...
The knucklehead is a retronym used by enthusiasts to refer to a Harley-Davidson motorcycle engine, so named because of the distinct shape of the rocker boxes. [1] The engine is a two-cylinder, 45 degree, pushrod actuated overhead valve V-twin engine with two valves per cylinder.
Knucklehead: 1936–1947 Panhead: 1948–1965 Shovelhead: 1966–1984 Evolution: 1984–1999 Twin Cam: 1999–2017 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 ...
The V2 engine introduced in 1948, colloquially called Panhead, was available as E, EL, F, FL depending on size and compression 2019 Harley Davidson FLHT. Harley-Davidson FL is a model designation used for Harley-Davidson motorcycles since 1941, when F referred to the new large capacity 74 cui (1200cc) variant of the V-2 Overhead valve engine (″Knucklehead″) that was introduced in 1936 as ...
The Shovelhead engine is a motorcycle engine that was produced by Harley-Davidson from 1966 to 1984, built as a successor to the previous Panhead engine. When the engine was first produced, the Shovelhead had a shallower combustion chamber, larger valve drop for both intake and exhaust, better porting, and stronger valves and pistons.
Valvetrain problems in early Knucklehead engines required a redesign halfway through its first year of production and retrofitting of the new valvetrain on earlier engines. [39] By 1937, all Harley-Davidson flathead engines were equipped with dry-sump oil recirculation systems similar to the one introduced in the "Knucklehead" OHV engine.
The Harley "Iron" was introduced in 2009 as a smaller-displacement version of the Nightster. The major differences are blacked-out engine, cast wheels instead of laced; narrower handlebars; and of course the smaller 883 cc engine displacement compared to the Nightster's 1200 cc. The Nightster was discontinued in 2012. [13]
S&S and V-Twin Manufacturing are the only motorcycle companies in the world to manufacture Knucklehead, Shovelhead, Panhead, Evolution-style engines and Twin-cam style engines. S&S manufactures the largest (143 cu in (2,340 cc)) engine to fit a stock Harley-Davidson frame.