The quickest "fix" is just to loosen the filler cap while you are riding. The engine will come back nicely. Z and I both know about that! The long term fix is cutting the fuel breather tube at the 45 deg angle. I haven't done that yet with my "new" TBA.

Blue/White 2007 TBA, Thruxton needles, Unifilter, AI removed, Polaris Bellmouth, Bubs, Nology Coils/wires, Lightbar, Ricor Intiminators, Hagon Nitros, Tall Sissy Bar w/luggage rack, Dart flyscreen & Lowers. 130 Mains, TrueGel Battery MG12-BS.