In 1951 only four 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 tank emblems ,chrome plated piston compression rings and rocker arms were machined with pushrod sockets. In mid 1951 the M-74B carb was introduced along with a larger diameter pinion shaft.
1951 gas tank emblems
Here are some great sources for detailed information about Harley Davidson’s 1951 Panhead
How to restore your Harley-Davidson by Bruce Palmer 111
Riding vintage website
the Jocky Journal web forum
[table caption=”1951 models” width=”1000″ colwidth=”100|50|50″ colalign=”left|left|center|left|right”]
model,engine type,actual displacement,compression,factory options,
EL hydra glide sport solo,61 c.i.high compression ,60.32 c.i.,7.0:1,__,
ELS hydra-glide sidecar twin ,61 c.i.high compression ,60.32 c.i.,7.0:1,S = sidecar gearing,
FL hydra-glide sport solo,74 c.i.high compression,73.66 c.i.,7.0:1,__,
FLS hydra-glide sidecar twin,74 c.i.high compression,73.66 c.i.,7.0:1,S = sidecar gearing,
NOTE: the ” S “ denoting sidecar gearing will not be stamped in serial number.
[table caption=”1951 models available colors” width=”1000″ colwidth=”25|25|25″
black,_____,bluish gray center. cream white mph numbers. red indicator,
1951 metallic blue,_____,_____,