RowdyForeman and I are having the same trouble. When the water gets over the tail pipe our bikes start sputuring and lose all power. If you let off the throttle a little bit then they will die. The water is not getting over the spark plug and the carb drain line is plugged. All plugs are greased and the bikes are not snorkled. We both have the same set up hmf pipe and jetted. Could the fuel mixture be off causing this? We have busted our heads trying to figure this out but no luck any help would be greatly appreciated.