If you want to call it a bike.

www.heraldsun.com.au/wazuma-v8-the-worlds-most-expensive-quad-bike/story-e6frfro0-1226226457394

I was having a talk with my younger brother about there being no quads that are adr complient
If you can have traditional HD trikes and then the leading steer trike with the can-am then why not a quad like that one,even a V6 would do..