You're welcome Gunner.
Since you have a couple mountain bikes around, one of these engine kits might be fun for you. They sell for around $100.00 complete, and take about 2 hours to install.
I've installed several over the years, and they do a heck of a job for the money. You can even buy a spare complete engine for 60.00.
No tags or DMV crap either.
http://www.ebay.com/bhp/bicycle-motor-kit