Re: Low gas mileage!
I agree. I have a 66cc on a Schwinn Jaguar, hardly every open it up to full throttle and often help it a little up hills. My motor is fully broke in and I'm running about 28-30:1 fuel/oil ratio. I'd be lucky if I'm getting 80 mpg, probably closer to 70 mpg on a 41 tooth sprocket.
There may be a few changes here and there which you could make (idle adjustment) but they're not going to give you a 100% increase in mileage which would get you in the ballpark that a lot of people are claiming.
Frankly I don't see it happening and would be quite amused if someone could show me a bike with a similar setup that can approach 150 mpg.