74″ OHV Super Power engine

The FL series premieres.

America is plunged into World War II. Production of civilian motorcycles is almost entirely suspended in favor of military production. The Service School is converted back to the Quartermasters School for the training of military mechanics.

Mechanics & Owners Guide to 1941-1959 Harley-Davidson O.H.V. Big Twins

Mechanics & Owners Guide 1941-1959 Harley-Davidson OHV Big Twins – Vol. 2

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