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Harley-Davidson Knucklehead motorcycle

1937: The Harley-Davidson “Knucklehead” motorcycle engine was first marketed in 1936 as a replacement for the flathead VL engine and remained in production until replaced by the “Panhead” engine in 1947. The Knucklehead engine was so named by the distinctive shape of the rocker boxes. The name was actually derived during the California “Chopper” culture of the 1960s. (Photo by ISC Images & Archives via Getty Images)

Harley-Davidson Knucklehead motorcycle
1937: The Harley-Davidson “Knucklehead” motorcycle engine was first marketed in 1936 as a replacement for the flathead VL engine and remained in production until replaced by the “Panhead” engine in 1947. The Knucklehead engine was so named by the distinctive shape of the rocker boxes. The name was actually derived during the California “Chopper” culture of the 1960s. (Photo by ISC Images & Archives via Getty Images)
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Credit: RacingOne / Contributor

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Editorial #:
131265166
Collection:
ISC Archives
Date created:
01 January, 1937
Upload date:
Licence type:
Rights-managed
Release info:
Not released. More information
Source:
ISC Archives
Object name:
94174883RG001_General-70
Max file size:
2700 x 1800 px (22.86 x 15.24 cm) - 300 dpi - 1 MB