The problems most likely would be with the fuel system and battery. When gas sits for long periods of time, it begins to break down and leave deposits. The carb(s) might clog up prematurely. When a battery is allowed to sit for long periods without a full charge, the plates can become irreversably coated with sulfate. It may not be able to hold a full charge. Over time, some fluids can absorb moisture and become contaminated. Coolant that sits for a long time can leave deposits. Rubber oxidizes over time, so even though the tires have plenty of tread, they'll have deteriorated.
Have the battery fully charged and load tested to make sure it still has full capacity. Change the brake fluid, fork oil, coolant, engine oil, and oil filter. Oil and wipe off the chain to remove dust. Drain the tank and add fresh gas. Add a maintenance amount of fuel system solvent such as Techron to to the first few tanks of fuel. Replace the tires with a fresh set. Check all hoses and fittings for tightness.
Once you have gone over the bike and freshened everything, enjoy your like-new, low-mileage ride!
Any concerned that the cylinders are not properly broken in or have developed rust from sitting around? I would be-it's no big deal though. Just pull the spark plugs and oil the cylinders prior to spinning the motor over. Check all the other stuff others have mentioned previously as well!
I wouldn't expect too much trouble for an '02. I'd change the fluids and battery, put a set of tires on it and call it good. I would imagine modern neoprem seals would swell up again after a few heat cycles and oil pressure, might get a little weepage at first but they should seal up after awhile
You'd think so, but long term storage is what causes so many motorhomes to experience short engine life. The limited usage results in mucho seal problems. (And I don't mean the kind of seals that you make those neat coats out of.)
You'll be ok. My experience with garage bound bikes are pretty good as a rule. Just check the fuel system, change the oil, etc.
But on any bike that's been sitting for 20 or more years, you run the risk of an exposed bearing (one not submerged in oil) forming surface rust and eventually failing. I've seen this on a few bikes that have sat for a long long time without being turned over. Comes from condesation I think.