Knucklehead Engine

New and used Harley Davidson Knucklehead engines for sale by individuals, parts suppliers, and dealers. Officially called the EL series when it was introduced, this V-twin engine got its "Knucklehead" nickname from the unique shape of the valve covers, which resemble the knuckles of a clenched fist. The Knucklehead, introduced in 1936, was Harley-Davidson's first overhead valve V-twin engine, and it marked a major departure from the flathead engines that the company had been using.

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1958 Harley WL WLA Panhead Knucklehead Flathead Servicar G Engine *2502A
1958 Harley WL WLA Panhead Knucklehead Flathead Servicar G Engine *2502A
$3,879.99

1948 Harley Panhead Knucklehead Fl El Hydra glide OEM *2756A Engine Motor
1948 Harley Panhead Knucklehead Fl El Hydra glide OEM *2756A Engine Motor
$18,879.99

1937 Harley WL WLA Panhead Knucklehead Flathead Servicar G Engine *2516B
1937 Harley WL WLA Panhead Knucklehead Flathead Servicar G Engine *2516B
$7,779.99

1961 Harley Panhead Knucklehead Fl Flh Duo Glide OEM *2549B Engine Motor
1961 Harley Panhead Knucklehead Fl Flh Duo Glide OEM *2549B Engine Motor
$17,779.99

Complete S&S 93
Complete S&S 93" KN93 Series Alternator Generator Style Knucklehead Motor Engine
$13,889.95

S&S 310-0827 KN-93 Series Carbureted Engine Harley Knucklehead Style
S&S 310-0827 KN-93 Series Carbureted Engine Harley Knucklehead Style
$13,889.95