THE HARLEY-DAVIDSON® KNUCKLEHEAD® ENGINE

The KNUCKLEHEAD® years were from 1936 until 1947.

Near the end of World War 2, Harley-Davidson® introduced their new engine consisting of an overhead-valve v-twin design with covers on the valves that resembled knuckles, hence the name of "knucklehead". This new motor named the knucklehead, was good for both Harley-Davidson® and for America in this period of motorcycle history.

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