Knucklehead

Knucklehead

The knucklehead was a Harley-Davidson motorcycle engine, so named because of the distinct shape of the rocker covers (valve covers). The engine is a two cylinder, two valve per cylinder, pushrod V-twin. It was the second type of V-Twin engine used by Harley-Davidson, replacing the Flathead engine in 1936. The engine was manufactured until 1947 and was replaced by the Panhead engine in 1948.

As the design of Harley-Davidson engines has evolved through the years, the distinctive shape of the valve covers has allowed Harley enthusiasts to classify an engine simply by looking at the shape of the cover. A knucklehead engine has round knobs on the cover resembling knuckles that give the knucklehead its name.

ee also

*Harley-Davidson engine timeline
*Dictionary

External links

* [http://www.factoryfat.com/hdmotorhistory.html Images of each style of Harley-Davidson engine]


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  • knucklehead — stupid person, 1890, American English, from KNUCKLE (Cf. knuckle) (n.) + HEAD (Cf. head) (n.). That infernal knuckle head at the camp ought to have reported before now, he thought to himself, as he smoked. [Charles H. Shinn, The Quicksands of… …   Etymology dictionary

  • knucklehead — ► NOUN informal ▪ a stupid person …   English terms dictionary

  • knucklehead — ☆ knucklehead [nuk′ lhed΄ ] n. Informal a stupid person; fool …   English World dictionary

  • knucklehead — UK [ˈnʌk(ə)lˌhed] / US noun [countable] Word forms knucklehead : singular knucklehead plural knuckleheads informal a stupid person …   English dictionary

  • knucklehead — n. a stupid person. □ Oh, I feel like such a knucklehead! □ Don’t worry, you’re not a knucklehead …   Dictionary of American slang and colloquial expressions

  • knucklehead — noun /ˈnʌkl̩ˌhɛd/ An idiot; a stupid or inept person Dont stick that screwdriver into the live electrical outlet, you knucklehead! See Also: knuckle …   Wiktionary

  • knucklehead — n A stupid or foolish person. That knucklehead can t read his own name without moving his lips! 1940s …   Historical dictionary of American slang

  • knucklehead — one who does not think, doughhead    What a knucklehead! He made the same mistake ten times …   English idioms

  • knucklehead — noun (C) AmE spoken used to address someone who you like who has done something stupid: You knucklehead, you can t go around saying things like that! …   Longman dictionary of contemporary English

  • knucklehead — noun Date: 1942 dumbbell 2 • knuckleheaded adjective …   New Collegiate Dictionary

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