parts for my blaster

me personally i would not change the gearing but i would get some new rear tires, first thing if i was you is go exhaust, carb, vf3's,alumi airbox with k&n, then aggressive port and polish. or 240 kit
 
Best thing to do is get your suspension built up (tires, a-arms, shocks). Then get some reeds (vf3's or boyesson). Then Get a carb, portwork (or vise versa), then a better pipe.