yeah and it will blow up fast if you keep playing with those screws. don't say i didn't warn you. We don't do that ride around at half throttle business then blip full throttle for a while. WOT for a while will mess you all up. You need to get the carbs straight first. You saw how it reacted to opening up the low the other day. It needs a bigger low speed jet and probably lower popoff pressure with those flame arrestors.
Just so you know, my top screw is closed and bottom is the only one open. My ski has plenty of bottom end with a MOD chamber too.-----Cue the haters.