Joe I got to keep her she is the only woman that will put up with me and my mess. I was thinking after you left your bike pulls so strong that you may have a Dyna 3000 or a Speedstar ignition module in it. Have you ever looked to see? Also check your pipes where the mufflers attach to the head pipes and also where the pipes bolt to the heads for leaks. That may very well be where your popping is coming from. Use an incense stick to check them with and watch the tip to see if it glows red from a leak. Let me know how it goes and if the popping goes away when you adjust the PMS.
Well, I finally got ahold of some incense sticks. I am here to tell you that this trick really works. I have the Cobra Slash Cut Slip-ons. They are both leaking at the header pipe joint. Laying down and looking underneath, I can see the exhaust dust where the leaks are. I tightened both pipes as much as I dare (don't want to break the bolts). The popping is reduced, but not eliminated. When I came back in, I was able to tighten the bolts another 1/4 turn while they were hot. I'll check them tomorrow with the incense. It's almost 10PM and getting to late to be neighborly.
Assuming this doesn't totally eliminate the popping, any other suggestions?