That's a Glenco Lil Gen. The frame is supposed to look like that, but the bars look like they were changed. I have the same bike and thought about shortening it. I'm glad I didn't, it's a very early bike (1963). It would have originally had a Clinton 4 cycle, with a single foot pedal to control the brake and gas. Pretty uncommon bike.
GlenCo was the Glen H Clemens Company out of Fort Wayne Indiana, which later turned into Manco.