fuel assembly valve

Can somebody tell me how this gets put back together. I’ve had it put two different ways, but gas is still not going through!? This routes from the petcock to the carburetors. I’ve looked it up as much as I could, how the fuel line goes & vacuum line & air vent line… my bike starts but I’ve had...

'79 CB750K. Idles rough at cold start. Previously I had to hold the throttle open for about 1 minute or it will die. Once it warms up a bit I can release the throttle and adjust the choke. The other day it cut out after about 1/2 a mile. I thought it might be flooded, so I waited a couple of...