I just bought a 96 Magnum 425 2x4 just the other day. Everything was in great condition, the wheels and tires were fine. The plastics only had two cracks, one under the seat when you took it off, and another on the right side to the back. We checked all the fluids, put in some coolant and tranny fluid, oil was fine, everything else was fine. This quad was used for food plots, was barely ridden over the years and used a few times for hunting. I have been riding it pretty hard, taking it through trails, in the mud, water, and other thick stuff. The chain guard came loose and you could hear it rattling and bumping every time the chain came around. The chain also has a lot of slack in it because we had two people riding together and riding it through trails put alot of pressure on the chain and loosened it up some. How do I go about tightening the chain? I've read on other forums, and even other websites that you need to loosen up the bolts and roll it back to tighten up the chain, and I keep coming across "1/4 in slack." I don't know much about atv's and repairing/maintaining them so any help is appreciated.