Thought of, tried, failed miserably, and moved on to something else. I think I have the chainsaw bike ready to test ride first thing in the morning. I finished it this afternoon but it was raining to beat the band. I wouldn't ride any bike in the rain especially a friction drive.
I ran out of gas on mine last week on my 31cc and had to pedal it home. It was one of the most miserable bike experiences yet and I was only a mile or so from home. But I live in a place that is somehow ALL uphill. I know that is impossible but it sure seemed like it.
The 31cc is on the stupid mountain bike so it has the 26" rear and the 24" front wheel. Should seem to be going downhill, but I live in HIGH POINT NC. They named it that for a reason. Miserable place for a fat old man to bike.