The firmware does make a difference. Popping was eliminated in the high and low rpm areas bounded by the Decel Fuel Cut settings.
My initial setting for the Decel Post Fuel Enrichement was 16.08, this was the setting that popped up after loading the upgrade. I was going to change it to 7.86 like someone on another forum suggested, but was unsure if a change that drastic was wise. Zippers always says to make "small" changes in all the settings. So I split the difference and set it to 10.0.
I took the bike for a ride and noticed the popping stopped. I also picked up a few "new" things. At one point, there was a single loud pop backfire during a shift from 1st to 2nd. I think this occured when I shifted right at the Decel Fuel Cut PRM High setting point. Additionally, the bike started lurching at the exact point the Decel Fuel Cut RPM Low setting is. It's like a blip of the throttle, or more exactly, the engine suddenly getting a dose of fuel during a decel.
So, when I got home I did two things. I changed the Decel Post Fuel Enrichment from 10.0 to 7.84. I tried to set it to 7.86, but it kept defaulting to 7.84. I also changed the Decel Fule Cut RPM Low setting to 1,500rpm, an area that I normally do not ride in. This way, any abrupt dose of fuel at that rpm will not affect my riding.
Suggestions, ideas, comments, feedback please.
How is everyone else coming with theirs?
Mark