if u have a airbox still u can take your airbox lid off and change ur jets. but im gessing u have pods.... if u have T.O.R.S. still u should remove it/no hp gain from this but u should get rid of it....... cool head and diff domes will up your compression, +4 stroker, + timing, and port job will give u a bigg gain .... u could get some 35mm pwk carbs. vforce 3 reeds cages.... thas about it as far as i kno.... anyone add if u wanna can give better info if i kno what kind of riding u do.....