I been waiting to ask you guys, and here is a good time: My cousin traded for a Harley in about 1975 or so with the same exact look. I think it had a 165cc two stroke. Of course it had big handlebars like a Schwinn bike of that day. Tires like this one with big long fenders and a big bicycle looking seat. And a bigger tank, of course. We all liked riding the thing 'cause it was funky. I think it was very late fifties or early sixties. Anybody had one or know about it?  

Boofer,
Search the net for Hummer, 165, & Super-10 models. (Harley Davidson)
They were popular when I was a teenager in the late 50's.   I had a couple of rat versions during that time period.  Japanese bikes started appearing in the 60's & they disappeared.  Only 5 HP, but were super simple to keep running.