As a rule of thumb - if the wobble starts at over 35 mph, it's the rear end (rear suspension/swingarm bearings) causing the wobble. If the wobble starts under 35 mph, it's the front end...
V4Bluey - Start from base setup. I would put the forks back to stock & set your sag front/rear. Get new springs if needed. Then go from there if you need to play w/ fork height. Hillbilly - you'll probably need a special socket to properly torque the stem (well, to measure it properly).