High I'm new to this site and new to atv's. I recently purchased a used 02 350 warrior and after first ride done well. Next ride the chain came off. So I was instructed to buy a new rear sprocket and double o-ring chain and I did. So next ride after adjusting the chain so it was tight. The chain came off again and damage the rear sprocket as we inspected the axel had alot of play. So we changed the bearings the bearing on sprocket side was completely gone and brake side was fined but carrier and bearing spacer had deep groves on both and the spacer was extremely hard to get off the axel. Ok got all that done back together about a 2 weeks later the chain almost came off so I stopped immediately and re adjusted the chain adjusters while doing that noticed alot of play again so I took the axel out again to inspect bearings and that same sprocket side bearing was demolished again please looking for as what should be my next step and to keep this from happening again. Thanks