I have a 01 and 02 so I would think pretty much the same. First look under the belly pan and see if you have a little hole that exposes a set screw. If so put a pan under it and take it out. While that is draining take your muffler off and loosen the bolts on your cover. If you have electric start I would take the batterie off also. Once oil is drained take cover off, whipe and inspect your gears, check bolts on your gears and chain tightness. Should be a rubber gasket that is re-usable on the cover. Put it back together and add oil. Can't remember how much exactly but one bottle of it will do usually two sleds. As far as the chain goes about 1/4 inch play is what you are looking for. Hope this helps. (if you don't have or can't get the set screw out still can do all the above just oil will come out when you take the cover off that's all)