My buddy has an '03 Banshee. He's had it since it was new and I guess he keeps having the same problem over and over again. I'm going to do the best I can to describe it, but I've never worked on this quad so I can only go by what he's telling me.
I guess the bolts that hold the axle carrier in keep coming loose until the point that they back out and go into the rear sprocket and skrew everything up. Anybody heard of this? Is it a common problem with the banshees? I think this is his third time dealing with this issue.