In 1951  only six big twin models were offered.  The EL and FL models were continued.  ELS and FLS sidecar gearing models that where offered in 1949 but not in 1950 where brought back.    production of the low compression models E and F was discontinued. Also in 1951. new style gas tank emblems, chrome plated piston compression rings and rocker arms were machined with pushrod sockets. In mid 1951 the M-74B carburetor was introduced along with a larger diameter pinion shaft.

1951 sales brochure


1948-1952 speedo
1948-1952 speedo


1951 gas tank emblems

harley davidson gas tank emblem 1951-1954
1951-1954 emblem

Here are some great sources for detailed information about Harley Davidson’s 1951 Panhead The panhead and flathead site

How to restore your Harley-Davidson by Bruce Palmer 111

The Harley Davidson Panhead service manual 48-57 rigid

Riding vintage website

the Jocky Journal web forum

1951 models

modelengine typeactual displacementcompressionoptions
EL sport solo61 c.i.high compression60.32 c.i.7.0:1
ELS sidecar twin61 c.i.high compression60.32 c.i.7.0:1S = sidecar gearing
ELF sport solo foot shift61 c.i.high compression60.32 c.i.7.0:1F = foot shift
FL sport solo74 c.i.high compression73.66 c.i.7.0:1
FLS side car twin74 c.i.high compression73.66 c.i.7.0:1S = sidecar gearing
FLF sport solo foot shift74 c.i.high compression73.66 c.i.7.0:1F=foot shift

NOTE: the ” F “ denoting foot shift will not be stamped in serial number.

NOTE: the ” S denoting sidecar gearing will not be stamped in serial number.

1951 models available colors

BlackBluish gray center. cream white mph numbers. red indicator
1951 metallic blue
Metallic green
Persian red
Rio blue