1) ID the noise source. Loose fender, no oil in forks, brake caliper bolts loose, steering stem bearings a bit loose, engine mounts, fuel tank rattling, etc. If you find something expensive pre-broken from the factory call up the dealer.
2) Adjust, tighten, lubricate as necessary.
Doing the job yourself is the best general route unless it's engine guts. If it's brake related you'll have to decide if you want an "iffy" dealer repairing your brakes. Expensive pre-broken bits are best paid for by "others" if possible.