Decel popping is easy to fix with the PC modules. First, connect your laptop to the PC unit. The map that comes up should be saved!!
Take the bike out and shut the throttle down at different rpms. Note at which rpms the popping occurs. Then bring her home, plug in the PC into your laptop and increase the fuel vales at ZERO throttle for those rpms where the popping occurred. I went up by at least +10 at each point and eliminated the popping completely. I needed even richer settings at some rpms. Take her out again and see what happens....readjust as needed on your laptop. Two or three rides and you'll be OK.
Don't be afraid because you can always go back to the original map you saved at first hookup to the PC.
Understand, you are only increasing A/F ratios at ZERO throttle so none of the ratios at any other throttle opening will be changed so performance will not be affected.