You can build yourself something similar to the Janus, but with far less speed, looks and quality for $500 or less. Good for 20-25 mph.
The Phantom motorbike (pictured below) is kind of half way between the $500 DIY and Janus.
It looks great, goes 30 mph, and requires no tag/insurance in most states.
Bicycle and Engine Kit $ 1750.00 -IN STOCK. You can get it for $600 less if you assemble it yourself.
http://phantom-bikes.com/shop/motori...m-ghost-26.php
