Well, I have not owned it long enough to know the actual gas milage, but that's what I was told from five flags motorized bikes. I put a different rear sprocket on it to get it to the 37 mph, and if you change the sprocket on the gearbox it will go even faster. It's not recommended to change the sprockets for speed on the 2 cycles, but this is a four cycle with more power and reliability. The spokes on the bike are stock. I know a man in Navarre that builds these bikes and he has never needed to upgrade the spokes, and he uses one as his daily driver from Navarre to Milton and back everyday. Thanks for your interest.
Most of these motorized bikes get about 85 to 100mpg, how does yours get such high gas mileage?? Top speed is usually around 30 mph tops, again, yours gets 37 mph?? How is it geared to go that fast? And finally, are the spokes heavy duty to take the speeds and impact that you are talking about?
If everything you say about the bike is true, I would offer you $500 for it. That is the going rate for motorized beach cruisers on the motored bike forum where I am a member. Thanks for the information.