Leeann

Can anyone help me!? I can't get my dragstar 650 classic started anymore. I know it's a fuel problem because no fuel is getting into the carburetors. It's turning over but engine just won't fire. I have replaced the fuel, the fuel filter, the oil, the oil filter, the air filter, the fuel pump relay, the battery, the spark plugs, and I've had the carbs professionally cleaned. I've also tested the fuel pump by connecting it straight to the battery and it worked. None of the fuel lines seem blocked either. im running out of things to replace thanx!