Sold my car, building a bike!

Its going to be an interesting build for sure. I put a chainsaw motor on a bike just like that but I never could make it work the way I wanted so I switch to a weed whacker 31cc on the front wheel. That works perfectly.

http://motorbicycling.com/f36/front-wheel-drive-bike-3599.html

Since I think that is a friction drive you might want to read some of the friction drive posts in the diy section here. Lots of people have been experimenting with it.