Harley-Davidson Engine Timeline. The 1st four engines were in alphabetical order, that's how I remember. Flathead, Knucklehead, Panhead, Shovelhead. http://kiwav.com/?utm_source=pinterest&utm_medium=organicpin&utm_campaign=hdenginetimeline
Learning your Harley ABCs
Can't tell a Panhead from a Shovelhead? Don't know the difference between an FXST and a FXDWG? Lemmy explains Harley-Davidson's sometimes odd nomenclature.
Harley Davidson Sporster Iron 883 slightly customized. More