You will get 1000 answers. Me personally went from stock, to trails, to dunes, and now to drag. Looking back I think porting my trail bike made the most diff. If I had to do it all over again, I would do this order. Tires, pipes, porting, coolhead, timing plate, pancake, and impeller. A few little other things. Then move on to A-arms, shocks, and swinger the next go around.