This is in reference to backfiring when the throttle is closed and decelling at higher RPM's. Not poping... Backfire. Boom.
I think I stumbled across something and wonder what you think. (before I accept it as fact, although it has fixed mine)

I think my idle was too low. So I turned it up a little bit and my backfire has yet to be heard again.
Seems to make sense with the whole lean and then instantly rich thing that goes on here.
Any thoughts?