popping thru exhust when i let off throttle

Before you tear the carbs apart try changing the exhaust O rings in the head a small exhaust leak will cause your problem.

well my buddy had some pilot jets that he drilled out to the equivelant to the #50 so i figured why not try them i put them in and set pilot screw back to the 1 1/2 turns that the carbs were at before i messed with them it took away all the popping running great thanks for the help