problem with slip-ons mufflers

If all you have is slip-ons then you shouldn't need a power-commander but you might. Also, the backfiring that your getting is more than likely coming from your pair valve. You need to remove that thing quick! www.fastsjonny.tk/ has some great instructions on a lot of the different mods for the busa.

Lose the scorpions, don't know anybody with them that is happy with them for a busa.

No big deal LayinLo, just havin some fun.

yep, and removed the question that no longer made any sense.

any other busa specific probs you have check:
www.hayabusa.org
www.suzukihayabusa.org
www.labusas.org

these have plenty of info on the busa, but not much on any of the other bikes out there