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The Panhead is an overhead-valve Harley-Davidson motorcycle engine, so nicknamed because the rocker covers resembled cooking pans. The engine is a two- cylinder , two- valve -per-cylinder, pushrod V-twin , made in both 61 c.i. (EL) and 74 c.i. (FL, FLH) displacements.
As the design of Harley-Davidson engines has evolved through the years, the distinctive shape of each model's valve covers has allowed Harley enthusiasts to classify an engine simply by looking for those shapes. The contours of a knucklehead engine's valve covers resemble knuckles on a person's fist.
Willie G. Davidson's 1980 Harley-Davidson Custom Belt-Drive FXWG at the Harley-Davidson Museum. Davidson joined the design department of Harley-Davidson in 1963. In 1969 he was promoted to Vice President of Styling. [7] His designs during the 1970s included the 1971 FX Super Glide, the 1977 FXS Low Rider, and the 1977 XLCR Sportster-based cafe ...
Harley-Davidson's official name for the engine was likely related to the company's attempt to reform its image following the 1981 management buyout from previous owner American Machine and Foundry (AMF). [2] Both the heads and cylinders of the Evolution engine are made from aluminum to reduce weight compared to a cast iron design.
Harley Jarvis Earl (November 22, 1893 – April 10, 1969) was an American automotive designer and business executive. He was the initial designated head of design at General Motors, later becoming vice president, the first top executive ever appointed in design of a major corporation in American history.
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Harley-Davidson executive Jeffrey Bleustein contacted Davis shortly afterward and began negotiations to buy Davis's design. [8] Davis sold his patents, prototype, and tooling to Harley-Davidson in January 1982. [9] After further testing and development, Davis's design was introduced in June 1983 as the 1984 Harley-Davidson FXST Softail. [6]
Harley-Davidson Twin Cam engine at the Harley-Davidson Museum. The Harley-Davidson Twin Cam are motorcycle engines made by Harley-Davidson from 1998 to 2017. Although these engines differed significantly from the Evolution engine, which in turn was derived from the series of single camshaft, overhead valve motors that were first released in 1936, they share a number of characteristics with ...