"Vaughn" wrote a fairly
lightweight belt reduction drive, why aren't more rice burners being used
in
UL's?

Many times I have looked down at the faithful engine on my old BMW,
built like the proverbial brick ****house with all roller bearings, and
wondered...

Vaughn

Good question guys. Maybe Chuck S. could tell us. My teenage
infatuation with the extremely lightweight yamaha 125cc two-strokes
lead me to discover that it was because those engine designs were
rated for only momentary high power at the top of the power band. But
that didn't scare the footlaunchers in the 70's!

pacplyer