I just had a set of V&H Big Shots Staggered installed on my bike and am experiencing that popping sound upon deceleration also. From what I understand from everyone, this is largely due to the AF mixture and can be cured with a new computer map and a dyno tune. My dealer told me they "remapped" the engine after installing the pipes, but after speaking to a chopper shop owner near me, he explained that H-D simply sets up the computer to be remapped as opposed to actually remapping the engine for the new pipes. Has anyone else heard of this before? Or am I being fed incorrect info?
Tanker,
Do you have a SERT or PowerCommander? If not, what the dealer did was download the Stage (?) calibration to your ECM. The "Stage" calibrations are for Screamin' Eagle pipes, and will not be optimized for your V&H pipes. If you have a SERT or PC, then a good tuner should be able to remove fuel on decel to reduce or eliminate the popping.
BTW - I had a set of the staggered pipes on my previous bike (Super Glide Sport), and absolutely loved them. Excellent appearance, sound, and performance with the Power Chamber crossover. The bike was carbureted, so on decel from high rpm's it did pop some, but not on normal low speed decel or on shifts. If you removed the baffles, try putting them back in. That will also make a difference.
Jerry