One rather elegant solution I have seen here on the boards is to bore a small hole in the top of the #1 cylinder filter, install the AIT into it so the probe is inside the filter, but not blocking anything, seems like a good spot, but you'd have to hide that wire... somewhere.
Believe it or not, this is the EXACT reason I switched to a Ramairv2 setup, so much lazy, and so easy to install with it.
PS: If this is the bike with my tune, let me try something I'll send you an update see if it sorts the backfiring. Leme guess, it's doing it when you are in idle or clutch pulled in and blip the throttle?