The 650 NK is CFMOTO’s entry into one of the most exciting, up and coming motorcycle categories. The Naked Motorcycle. NK. No nonsense performance comes when form follows function. Here’s the straightforward answer. The 650 NK will fit you like a glove as you carve up some twisties on your favorite back road blacktop. Get in on the ground floor with the motorcycle that is getting great reviews. Awesome power. Tremendous handling. At an honest price.