Hey Mazdarx
Tex has it right here...
The stock suspension is pretty soft. For your size and weight I would increase the rear to the max preload, and also change the rebound adjuster to max (4).
For the front, you can add some spacers to the top of the fork springs to increase the preload, but the springs are really too soft stock, even for a 180 lb rider. Best option is to change to progressive or racetech springs.
The valve clearances should have been checked at 500/1000 miles, but if your not sure, then check the clearances. Then they are usually pretty stable until20-30,000 miles.
If you do a search on "suspension" you'll find a bunch of comments about how guys have set their bikes up.
You can consider increasing the tire pressures. Suzuki recommends some pretty low numbers (36 rear 32 front). I tend to increase slightly when I have my hard bags on, and full, for a long trip. Something like 38/40 rear, 36 front.
Otherwise, keep an eye on the air filter, change the oil regularly, and get out and ride. I just passed 33,000 miles (53000 km) and my bike runs like a top. I usually ride it in the 5-7000 rpm range for touring, but I also frenquently run it from 8-11,000 when playing in the corners, and it also runs fine at 3000 rpm (but makes no power).