I ride with a guy who (rides a 300XCW) and also has an Arctic Cat, I think it is a "Wildcat". Anyway he bought it from a Dealer in Montana. The dealer did some performance mods to it, but also licensed it in Montana. So it's licensed and plated in Montana. Through reciprosity laws, that makes it legal in other states. I'm not sure of the exact nature of how legal, but when stopped, he has just shown the registration and proof iof insurance, and was sent on his way. He maintains a P.O. box in Montana to register it to.