I HAVE MY HEAD MILLED 30 THE CYLINDER IS BORED LIKE 50 BOOST BOTTLE AND REEDS IM AT SEA LEVEL AND IM RUNNING A 260 JET.I JUST BOUGHT THIS BANSHEE THE GUY TOLD ME TO TURN THE AIR N FUEL SCREW1 AN A HALF OUT I ALSO INSTALLED THE 260 IT HAD A 210 IN IT.NOW WHEN I CHECK THE PLUGS 1 SIDE IS RICHER.