picture 2351 is a Bayou, 9959 is a Lakota. Notice that the bayou has an extra piece of plastic over the fender that makes it wider. Another easy to spot difference is the front bumper/headlights. The Bayou has a framed gap between the headlights, the Lakota does not. Twyztid is right, ALL Lakotas were 2WD.....so if it has driver shafts going to the front it's not a Lakota. As for parts, bikebandit.com is usually a good source, but can't be sure until we know for sure what machine it is.