The Knucklehead was the first Harley Davidson what mounted distribution OHV (Over Head Valves, overhead valve) in 1932.

Contrary to what we might think Flathead engine was not removed, it was benefited from some of the solutions that were used in the new model, with its lubrication system. New engine was available in two displacements, 988 cc and 1,200 D.C. with various compression ratios also.

The rocker cover on this occasion was made with a shape reminiscent roughly knuckles of a closed fist, hence its name Knucklehead (knuckle head).

At the time the Harley was a bike designed for long distances by land more or less scabrous, at relatively low speeds, which made heavy, slow and not very maneuverable, very American style. Its “opponent”  European was the Vincent Rapide, which was nearly sixty kilos lighter, had a 10% more power and was able to roll more than the Harley, but better roads.

The engine remained in production until 1947 when it was replaced by the Panhead engine, but still holds the privilege of being the most desired engine Harley enthusiasts of the brand.

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