Out riding on the weekend, after a break it wouldn't start, we traced the problem to the fuel pump. Pulled it all apart and with some taps and wd40 got it to run again for a bit, quit again in a mud hole causing front cylinder to fill thru exhaust. Got all the water out, none made it to the crankcase at least. Pulled fuel pump out again and got it working to start and run for 1/2 hr to dry exhaust out. Started it again today, heard pump pressure up and ran for 5min and died, now no sound from the pump again so question is, since I can't seem to buy just the pump, only the whole pump/tower/fuel gauge float assembly($500), what kind of pressure would I need for a inline fuel pump?