My fuel pump doesn’t prime when the ignition is turned on but kicks on when I’m starting the bike and doesn’t turn off floods the carbs and pushes fuel out the air vent lines on carbs. I’ve hit a wall on my knowledge

 

Also installed new fuel cut relay already didn’t fix it

 

I am not sure about the f4, but the f3 fuel pump operates just as you described by design.

As to the flooding carbs, have you checked the shutoff valves in the problematic carbs?

What is the history of the bike?

 

I’ve taken the carbs apart and completely rebuilt them the only thing I didn’t replace was the flit needles because they didn’t seem to stick or have any issues and floats didn’t fill with gas or anything so they aren’t damaged the bike has 35k miles on it but great compression still and runs like a charm when I get it to fire off the only thing I can think of is foot needles are t sealing off and at allowing the fuel to free flow

 

the fuel pump is very low pressure and should shut off when the bowls are full.
as a test, bypass the pump and go gravity fed. I imagine you will experience the same problem.
That will remove the fuel pump system from the equation.

 

I’ve tried gravity feeding it doesn’t flood when gravity fed but also doesn’t idle for long before stalling that way the pump I have on it is a 3-6 psi just a little stronger than the stock 2-4 but I wouldn’t think it would be significant enough pressure difference to blow through the float needle

 

Do you have access to a factory service manual?
In the f3, there is a test to measure the output of the fuel pump. On the f3 the output should be 23.7oz per minute. I'm guessing the f4 manual would have a similar test.

 

• Yes I’ve narrowed it down to the far left carb is flooding all the rest are not flooding so I’m assuming it’s likely a bad float needle i took them all out there’s no tears or cuts but the one that’s flooding did have a slightly noticeable indentation ring where it seals so I assume that’s where the problem is so I’m gonna go pick up a new kit for that and see if it fixes it. Other issue is it still doesn’t wanna stay idling in the right two carbs there’s back fire of compression every 3to 5 seconds and it shuts off pretty quick after that

 

Are you looking at item #22 on this site?

 

Yes that particular part I believe is my problem