Harley-Davidson Knucklehead

Harley-Davidson’s first overhead-valve V-twin, named after its rocker covers.

The overhead-valve EL gave more power than the old engines. Its teardrop tank with instruments on top became a model for later Harley-Davidsons.

Materials: Steel frame, overhead-valve V-twin engine

Manufacture: Made in Milwaukee.

The rocker covers that look like the knuckles of a clenched fist.

The tank with the instrument panel on top.

• Motorcycles
• Harley-Davidson