Engine running rough

I am still having trouble with the idle of my engine. I have pretty much done everything under the sun that a layman can do. I have completely cleaned the carburetor out, installed a snazy in-line filter, checked the solenoids, turned the idle screws all out 3 turns, and checked the wires. The bike will not idle without its choke.

Here is what it is doing:
It will start fine but then slowly kills itself. Watching the inline filter less and less gas goes to the engine during this process. Since it drains itself it is fairly hard to start when this is going on. One quick jolt of pri will start the bike immediately. It will run on pri without cutting out.

It does not sound like it is running evenly. When it dies it sounds like it is chugging and all most backfires when given throttle.

What else can I do to this thing?

 

pull the fuel petcock and see if the filter screen inside the tank is plugged with rust/varnish.

sounds like the fuel valve is not feeding gas to the carbs, could be plugged or could be due to a malfunction with the vacuum diaphram in the fuel valve

 

If a bike won't Idle without Choke ... it isn't getting enough Fuel from the Pilot Mixture Screws.

Lets see the Plugs.
Pull them and line them up
Take a close-up of the business ends and lets see what you got!

 

test the petcock before you pull it, suck on the vacuum line to see if you get flow.

 

I agree, sounds like fuel valve

 

Thats a petcock issue. Make sure that gravity is working on your side.
If the petcock is dead, buy a new one from Chacal ~$50