It's legal in SD. I have an 06 Raptor 350 with a horn and a mirror so I can see my left knee and fender (just a 1.5in circle thing glued to front fender). I've gotten pulled over for speeding, wheelies, and endos. Never got anything yet.

 

Hey guys check out some of these links I found on your subject.

http://www.diseno-art.com/encycloped..._revolver.html

http://streetlegalatv.com/welcome_to...legal_atv_.htm

http://www.tiresnstuff.com/atvBigfoo...perRadial.html

They put a single swing arm on the back, but still pretty cool.^^

retro

P.S. I found an eco friendly street legal link too.
http://www.atvsource.com/articles/pr...ctric_quad.htm