Harley Davidson Knucklehead Engine 1936 - 1947

The legendary Engine with the iconic rocker boxes set standards for decades. its a masterpiece and a symbol for ingenuity, .the early engines of this type appear during 1936 (E, EL models 61 ci.) with a notched cam cover, exposed rockers and curved manifold with 3 screws flange, around 1937 the cam cover was changed to the shaved one due some oil system changes and the rockers tin covers showed up . the early oil pump will change twice until 1940, from 1941 like the following engine (F, FL, models 74 ci.) the cases are stronger with longer ribs on the left engine case, the late centrifugal oil pump recognized by its higher and complex topography cover, the T shape of the manifold the 8 fins cam cover, large intake ports with no primer signs ...

Harley Davidson Knucklehead Engine Moving Parts Arrangement...
Harley Davidson 74 ci, Knucklehead Engine 1941-1947

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