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The Welch plug is a type of core plug that is made from a thin disc of metal. The Welch plug is dome-shaped and inserted into the casting hole with the convex side facing outwards. [6] When installed by striking the Welch plug with a hammer, the dome collapses slightly, expanding it laterally to seal the hole.
Harley-Davidson Shovelhead engine at the Harley-Davidson Museum. 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 ...
In 1906, Harley and the Davidson brothers built their first factory on Chestnut Street (later Juneau Avenue), [13] at the current location of Harley-Davidson's corporate headquarters. [14] The first Juneau Avenue plant was a 40 ft × 60 ft (12 m × 18 m) single-story wooden structure. The company produced about 50 motorcycles that year.
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.
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Harley-Davidson Panhead engine at the Harley-Davidson Museum Harley-Davidson panhead motor Replicas of the Captain America bike and Billy Bike at the Harley-Davidson Museum in Milwaukee [1] The Panhead is an overhead-valve Harley-Davidson motorcycle engine, so nicknamed because the rocker covers resembled cooking pans.
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