In 1957 the FLE and FLEF traffic combination models are discontinued leaving only the FL,FLF,FLH and FLHF models.
1957 featured new round Lucite tank emblem. this emblem and a new fender tip were Harley’s first use of plastic for emblems.
Engine changes include steel alloy valve guides replacing the bronze, exhaust guides are threaded to trap oil,
shorter push rods with longer adjusters,stronger valve springs.
big Bertha saddlebags are optional in 1957 only.
Here are some great sources for detailed information about Harley Davidson’s 1957 Panhead
How to restore your Harley-Davidson by Bruce Palmer 111
Riding vintage website
the Jocky Journal web forum
|model||engine type||actual displacement||compression||factory options|
|FL sport solo||74 c.i.high compression||73.66 c.i.||7.25:1||___|
|FLF sport solo footshift||74 c.i.high compression||73.66 c.i.||7.25:1||F=foot shift|
|FLH super sport solo||74 c.i. high compression||73.73 c.i.||8.0:1||__|
|FLHF super sport solo foot shift||74 c.i. high compression||73.73 c.i.||8.0:1||f=footshift|
NOTE: the ” F “ denoting foot shift will not be stamped in serial number.
|*black||_____||Warner speedo with italic "Day-Glo" green numbers and hash marks with gold painted center|
|P police white||_____||_____|
|P police silver||_____||_____|
|*metallic midnight blue||_____||_____|
|pepper red/black tank panels||_____||_____|
|black/pepper red tank panel||_____||_____|
|skyline blue/birch white tank panels||_____||_____|
|birch white/black tank panels||_____||_____|
|* metallic midnight blue/birch white tank panels||_____||_____|
*= extra charge
* =standard color could be ordered without tank panels at no extra charge.
P =police only