My future transportation plans include two wheel motorized vehicles. Aside from the fun factor (not inconsiderable), they do get good gas mileage. I have a 1982 BMW R100RS which hasn't run for several years (yes, I know that would be considered a crime by some). I will be getting it running again. It gets 40mpg. Not bad for a high speed touring bike. But that may be a gas guzzler if when gas prices go up. I have a project to combine two Yamaha SR500s that haven't run for 16 and 10 years, respectively, into one good one. The SR500, a 500cc single, gets 70mpg. Pretty good. But my friend Blaine turned me on to these.

48cc Chinese 2-stroke engines mounted in a bicycle frame. 150mpg and 30 mph. There are 60cc and 80cc engines for those that are mad keen on speed. I need one.

Those Cute Little Chinese Bike Engines

Canadas Skyhawk WD

Spit-Fire Motor Works

Gru Bee Motorized Power

Simpson Motor Bikes