Harley-Davidson Knucklehead engine
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The knucklehead is a
OHVs" by enthusiasts of the time and in Harley's official literature; the nickname arose from the California chopper culture of the late 1960s.[2]
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.
See also
References
- ^ Margie Siegal (November–December 2005). "1977 Harley-Davidson custom FLHS". Motorcycle Classics. Retrieved 2009-08-18.
- ^ Siegal, Margie. "It wasn't a Knuckle then". Motorcycle Classics. Retrieved 17 September 2016.