If I could figure out how to use that without the roller skates it would be a good idea. Me and roller scates get along worse than me and $4 per gallon.
Yeah, the skates lack something rather important - *brakes*.
When I was a kid, I saw several similar-sized 2-cycle engines fitted to bicycles. Those rigs were usually friction-drive and were mounted over the front wheel. I just did a quick search and found an interesting update of that idea. Search "Revopower" and you'll find a small gas engine and chain drive mechanism - all sandwiched into the hub section of a 26" aluminum bicycle wheel. The gas tank fits into a standard water bottle bracket.