did you bend your sprocket hub? that's what happened to me, and they wouldn't stay tight. I have actually been break teeth off, I think its from when they dig into the ground, the dirt can put stress on them and the teeth can break. You are supposed to have the chains loose on these quads too. Much looser than any other quad.
i have the guard on and have cracked the rear sprocket twice. I welded it once and then it cracked directly across from it. Is this a dealer warrantee or do i just have to put more money into my dam quad
I went through two rear sprockets. The first one started breaking off teeth and the second one was wearing really bad. I dished out the money and got a 39t from hot seat powersports, a KMC gold chain, and new stock 14t front sprocket. This combo has been good so far with 18" tires.