One iconic American crand of two-wheeled transportation gave birth to the Knucklehead in 1936, the production run ending in 1947. Mind you, they weren't called that back then. That came about in the psychedelic haze that was the 1960s in California, when the overhead valve HD engine was the powerplant of choice for the chopper mob. Ape hangers and knuckleheads have a certain synchronicity.
Which brings me to my point; the original two-wheeled Knucklehead is only seen in museums or being punted around on our roads by a few hardy souls these days, but boy, there's a plethora of the two-legged variety and they seem to be breeding. Over the decades we've all come across them
