[greenaero]

Originally Posted by etiainen

Aren't those mostly smaller displacement bikes? Doesn't the current competition require faster speeds?

http://www.craigvetter.com/pages/201...o-results.html

Seems a tad different now. The lower displacements are gone.

Etiainen, Correct, the 80's Vetter fuel economy competitions were in the 55mph national speed limit era so very small bikes could be used to reach the speed limit. The winners were also tiny, uncomfortable and impractical for daily use. The current Vetter Challenge requires motorcycles that can go 70mph into a 30 mph headwind, carry 4 bags of groceries and get 100 mpg. Craig Vetter's research indicates that at least 16 HP is needed so that is why most of the competitve gasoline- powered bikes are around 250cc displacement .