Nobody seems to want to blame the air gap intake,

Before this carb on the same engine i have a regular avs 800 carb and im not noticed this problem with that one and im same always reading plugs with that carb to, i only switch to the avs2 because of all good i hear about it but in this case it become a problem instead, just a thought.One more thing is that the afr readings is very erratic to, Thats why i think maybe a street fominator intake would sute this combo better