Matt - I sold mine a couple of years ago, so I don't remember all the jetting specs. However, my buddy and I did manage to get ours jetted well for use at about 4,000 feet elevation by leaning out the stock settings considerably.
I think we used the leanest pilot jet available from Kawasaki (#38?), went down one or two sizes on the main jet (#158? or 160?), used a KX slide with 1mm more cutaway (or you can modify your stocker). Used a thinner head gasket from an '88 KX250, FMF pipe w/modified aftermarket KDX200 silencer, Boyesen reeds and rad valve, and opened up the side KIPS valves w/a dremel tool so that they were flush with the floor of the exhaust port when fully opened.
The end result is a very good trail engine with excellent low end (the stock flywheel is VERY heavy), smooth power delivery and a decent top end. Mileage is very good as you run down low in the powerband.
Other little tricks on this bike are to cut down the front of the seat foam to improve the riding position, shave the steering stop down so that the bars can turn further, raise the forks so about 3/8" are above the top triple clamp. If you run tight woods, you can shorten the chain and move the rear wheel all the way forward to shorten the wheelbase.
Use a good front tire like a Michelin S12 and a steering damper is always nice.
The stock forks are grim for the woods, IMO. My springs were 0.41 or 0.42, can't remember. Used Race Tech Gold valves, but with much less high speed compression and slightly more low speed compression than the RT charts showed. Ran the front springs with no preload so that the front would dive slightly when cornering (the stock steering is slow). Very plush in the rocks but much better at speed than the stockers.
Super stiff springs with the stock fork valving would not be good on rocks and roots.
Hope this helps - enjoy the bike. Mine was very reliable and lots of fun.
These changes helped the bike greatly for woodsriding and I honestly preferred it to my'90 200.