Originally Posted by WECSOG
Our motorized bicycles do sip fuel, but they are not really very fuel efficient. The two concepts are not necessarily the same.
I agree, and there are a few factors.
The right amount of power to drive the given load,
and mechanical leverage.
A 49cc 4-stroke jackshafted to an internal 3-speed hub is an amazingly economical machine to commute on, get aerodynamic even more so.
Comparing cars and motorcycles to direct drive MB's isn't fair unless you put your machine in one gear and leave it there for the whole gallon test ;-}
Speaking of gas prices, I wonder what all those Keystone pipeline investors and politicians (same thing I'd bet) are thinking as the price of oil keeps dropping.