Harley-Davidson Museum - 1920 Model WF Sport. This vehicle is one of only two opposed twin models ever built by Harley-Davidson. It has a fore and aft opposed twin set in a
1920 Harley Davidson Board Track Racer
7-9 h.p. Harley-Davidson 1920
File:Harley-Davidson with side car (1920) jm64198.jpg - Wikimedia Commons
Harley-Davidson - Model F - 1000 cc - 1920 - Catawiki