Ray, keep in mind that if you've changed to Bub pipes which are less restrictive that stock, what I call decel rumble should increase. After carb work and SS pipes, I definitely got decel rumble and some popping I never had before. If you richen up the mixture to eliminate all decel popping you'll find you're running too rich (check plugs from time to time).
I recently checked my plugs and found I was still too rich. I turned the screws in a bit for a more optimum mixture and the decel popping went up. The bike runs great and I'm getting used to my new "normal" level of rumble. Now, both me and the plugs are happy.
