Well the Ham Can air cleaner was first introduced on 1978-1/2 models and included electronic ignition system as well.

Rear brake assembly of type pictured was first used on 1981 FL/H models. Front brake control appears to be the type used from 1972-1981. Rear brake master cylinder cover is the type intorduced in 1979.

I don't see the "AMF" sig as part of the Harley Davidson tank badge emblem (or maybe it is there and just not readable from the pic). Bike has the pogo seat assembly which was used until early 81. The later frames were made in such a way that you could not run the pogo style seat (seat post would not fit).

Front fender tip has the "80" script on it (referencing the larger displacement motor (intro'd in late 78) and that fender tip was used on 78 to 1982 models.

So I am thinking the bike is probably a 1981 FL/H model.