Knucklehead Engine

New and used Harley Davidson Knucklehead engines for sale by individuals, parts suppliers, and dealers.

Clicking on the links below will open a detailed description of the Knucklehead engine in a new window on eBay.

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Beautiful! 1939 Harley Davidson Knucklehead Motor Engine OEM Rebuilt Title M5
Beautiful! 1939 Harley Davidson Knucklehead Motor Engine OEM Rebuilt Title M5
$31,499.00 (  Bids)
Buy It Now for only: $31,499.00
OEM 1940 1947 Rear Big Port Head Knucklehead Harley Engine FL Panhead UL W 421
OEM 1940 1947 Rear Big Port Head Knucklehead Harley Engine FL Panhead UL W 421
$1,450.00 (  Bids)
Buy It Now for only: $1,450.00
S&S Cycle Knucklehead HD Engine KN93 Gen
S&S Cycle Knucklehead HD Engine KN93 Gen
$12,725.99 (  Bids)
Buy It Now for only: $12,725.99
S&S Cycle Knucklehead HD Engine KN93 Alt/Gen
S&S Cycle Knucklehead HD Engine KN93 Alt/Gen
$12,725.99 (  Bids)
Buy It Now for only: $12,725.99
original Harley Davidson Front Safety engine Guard crashbar knucklehead panhead
original Harley Davidson Front Safety engine Guard crashbar knucklehead panhead
$1,200.00 (  Bids)
Buy It Now for only: $1,200.00
Engine Motor Bare Cylinder Head Set Pair 38 39 Harley Knucklehead EL Big Twin 45
Engine Motor Bare Cylinder Head Set Pair 38 39 Harley Knucklehead EL Big Twin 45
$2,602.30 (  Bids)
Buy It Now for only: $2,602.30
Used 1997 Zippo Harley Davidson Knuckle Head Engine Type Lighter Very Rare Japan
Used 1997 Zippo Harley Davidson Knuckle Head Engine Type Lighter Very Rare Japan
$1,489.00 (  Bids)
Buy It Now for only: $1,489.00
Complete 1940 1947 Rear Big Port Head Knucklehead Harley Engine FL Panhead UL W
Complete 1940 1947 Rear Big Port Head Knucklehead Harley Engine FL Panhead UL W
$2,630.00 (  Bids)
Buy It Now for only: $2,630.00
OEM 1940 1947 Front Big Port Head Knucklehead Harley Engine FL Panhead UL EL 503
OEM 1940 1947 Front Big Port Head Knucklehead Harley Engine FL Panhead UL EL 503
$1,600.00 (  Bids)
Buy It Now for only: $1,600.00
Used 1997 Zippo Harley Davidson Knuckle Head Engine Type Lighter Very Rare
Used 1997 Zippo Harley Davidson Knuckle Head Engine Type Lighter Very Rare
$1,499.00 (  Bids)
Buy It Now for only: $1,499.00