Welcome to the club Buster.
My bike is probably the biggest piece of junk on the board by most standards... Never gets washed, stays outside year round, has been ridden wide open since day one... has been modified to within an inch of its life several times...
I've never had to adjust the valves, and mine is a 1998. Absolutely zero cam chain noise. Never had a clutch issue other than stretching the cheap factory cable. My bike got the everloving s**t beat out of it on a regular basis riding year round on the Gulf Coast, Memphis area and in the mountains of Washington state. Takes it and happily comes back for more... 15W40 conventional diesel oil or 20W50 conventional oil, filter changed when (if) I remember it has one.
Petcock never failed (ATF or Marvel Mystery Oil in every 2 or 3 fill ups), vacuum slide in the carb never failed. Fuel tank got holed when my stepson crashed the bike a few years ago so I now run a 60s or so era tank with a manual petcock.
The electrical parts on the bike suck. Mine has been down for quite awhile because of it. Switches that fall apart, relays that fall apart, too light of wiring (that appears to go nowhere)... Cut a notch in the left side of your battery box and run a 14LA-2 battery, less than 1/2 the cost of the oddball stock battery. And you can find them anywhere (Wal-mart, auto parts stores, independent bike shops, etc).
If the bike still ships with IRC tires replace them now. They are only good for a couple months, tread sands off pretty quickly. There are 3 sizes of front brake pad thickness, buy the EBC thin ones. Intruder 800/S50 rear shocks will give you a better ride and firm up the handling a bit. Throw the belt tensioner away (the little brass plunger in the tool kit). Run the belt a bit on the loose side, doesn't squeak as bad or put as much stress on the output shaft. Don't trust the swingarm alignment marks, they are always off side to side.
Have fun with it. Great commuter/weekend bikes. Great platform to make it suit your taste. I've seen them turned into cafe racers, Scramblers (dual sports), barhoppers, bobbers, rigid choppers, touring rigs...
Intruder shocks, Harley fender, unknown gas tank, semi-rigid bags, ape hanger handlebars, side mount 7" headlight (stock light shattered, tool roll bounced)...
Like I said, have fun and make it your own. We're here if you get stuck.