I have to agree with RocketDaryl on this to a point. That point being mods to the motor ex: exhaust, air filters. You will then did to adjust the programing for the mods. BUT, that may not be something that most guys can do without making it worst. Then you will need to have a custom MAP done or try differnt MAP's and check the plugs till it runs right. Most poeple get to a point of adusting the MAP and say that it is good enough. When it is far from alright. By the time they fined out it is to late for the motor.
I will be buying a Tuneboy when the discount rolls around again. I have D&D exhaust now and want to add the K & N filters along with "adjusting" the secondard plates. I have used PC III on my Warrior and it worked great. It took alot of time and it was worth it. Good luck, and have fun.