1957

New tank emblem is round Lucite disc, with 2 red and 2 silver quadrants with red "Harley Davidson" name. This and the new front fender tip was HD's first use of plastic for emblems.
Panhead changes: Steel alloy valve guides -(starting February 1st), instead of bronze exhaust. The exhaust guides were threaded to trap oil. Polished aluminum rocker covers, shorter pushrods w/longer adjusters, thinner speedo cable. The "Big Bertha" saddlebags were optional for 1957 only. Starting with 57FLH4444 stronger valve springs were used.

Sidecar and Chassis:
· LE - right hand sidecar
· M - Package Truck w/cover
· MC - chassis for M

1957 Panhead colors

Pepper Red with Black tank panels and Pepper Red fenders	Black with Pepper Red tank panels and Black fenders	Skyline Blue with Birch White tank panels and Blue fenders	Birch White with Black tank panels and Birch White fenders	Police Silver	Metallic Midnight Blue (and fenders), with Birch White tank panels
No extra cost: Birch white, solid or black panels and matching fenders, Metallic Midnight Blue (and fenders), with Birch White tank panels.
1957 Servicar colors
Pepper Red	Skyline Blue	Black	Police Silver	Metallic Midnight Blue
At extra cost: Metallic Midnight Blue.
For 1957 in the Flathead Register: For 1957 in the Panhead Register: Type Total G 17 Type Total FL 95 FLH 99