Easiest way of getting more power is to fit a free flow exhaust and free flowing air filters. Get a haynes/workshop manual and learn how to strip it down. Practice makes perfect and the only way to learn bike mechanics is by actually doing it! Then you can play with things like carburettor jetting, crank/valve/cam re-profiling, flywheel lightning etc. 2 Strokes are so easy to work on and tune. Beware though!! The more you tune a 2 stroke, the more you have to keep on top of maintenance or it'll go bang, usually in the middle of a corner!!