I've been a cyclist for many years myself. When I was living in North Dakota, I had trouble fighting the winds out there, so I decided to motorize my bicycle.
6 years later, still doing it! Out and about, people often ask me what kind of gas mileage I get. I answer "8-10 in my truck, 150-160 on this!"
My 2-strokes averaged 80-90MPG, I get much better with the 4-stroke.