2000 xc 700 sp gearing and clutching help

Hey everyone I need some help. I have a 2000 xc 700 sp it's pretty much stock I do have a slp boost bottle and 8t drivers to clear my 1.25 track. I'm 220 lbs and I want it to be a low/mid range monster, I ditch/trail ride and want best performance i don't care about top end as long as I can do atleast somewhere around 80mph. My Clutching is stock, pipes are stock cause I'm in wisconsin and we can't have aftermarket . Any help would be greatly appreciated thank you!