Check your gearing to, when i bought mine years ago, someone in their infinite wisdom had fitted a one tooth larger front sprocket, the thing would not rev out in top gear and would only do about 130. I fitted a 1 tooth smaller front, would hit an indicated 175-180 after that and had no problems redlining in 6th. They arent a hugely powerful motor and being a 2 stroke, if everything is not perfect it doesnt take much to loose hp.
Get someone to set the carbies up properly, fit new plugs, check/clean power valves, check your oil pump for correct amout of movement, probably never been done so the thing will be running rich on oil, repack your mufflers, yeah i know it sounds silly but it makes a difference on 2 strokes, better still find a set of lectron carbs and a set of micron pipes for it, that will liven the old girl up a bit

As far as the wobble goes, sounds like you should have it checked for straight and then have suspension serviced, marty moose would be the man to see for that.