73 xr7 no start

No. I replaced everything tank sender lines and fuel pump

Disconnect the fuel line going to the tank from the fuel pump. Remove the gas cap. Blow through the line going to the tank. You should be able to hear bubbling from the fuel filler neck. If you can’t blow through it you need to systematically start at the sender and work your way for ward to find the blockage. If you can blow through it then run a rubber line from the pump into a gas can with some gas in it. Disconnect the line at the carb and run it into a container. Crank the engine over and see if you get gas out of the pump.

I blew through the line and heard bubbles i have 1/2 of a tank of fuel thats why im thinking the new pump is bad

the short line test out of a gas can will tell you immediately if it is bad.