Like Wallrat said, for what kind of riding? It really depends on that before you decide what to do next. Port and polish, yes, but for what range. Then you might wanna change your intakes and go with different carbs(getting rid of the boost bottle in the process), but which ones depends on the powerband you're looking for and the portwork done. Change your crank and stroke it maybe.... There really isn't any one definite way to set up a shee', it all depends on you and what you want.