The "Whizzer" is a 138cc 4 stroke, the frame mount "wizard" is a China built 67.5cc two stroke. The Whizzer is built in Taiwan, the China-co. engines are built in China, a slight difference.

A Whizzer is 1600 bucks, a China-co. kit is 200.

__________________
If it ain't broke, and you mess with it long enough, it will be.