I just got this motor rebuilt so the compression should be good. Yea the 450r's that I raced have full exhaust, hrc kit, wideslide carb, and cdi box. Are there any upgrade cdi boxes for the banshee?(other than the pvl system that is hella expensive) I heard of something called a roost boost does it work. But if you are beating them with your mods, I should also right?