Carb hookup help needed for 86 VF500

I just want to verify the hookups on the carbs

1) I believe the vents circled in red are for sync? During normal operation I believe 2 of them group together and go to the vacuum for the petcock and the other two get blocked off? Does it matter which ones?
2) Anybody know why I would have the item circled in green? What is it? None of the other carbs have that line.
3) Are the fittings circled in blue the breather lines that go back to the airbox / smog system? I know the black one is the fuel line (not highlighted).

 

not totally sure about the vent lines but since that hose has a number on it it could be emissions related... with it being an 86 , it probably is emission control related. check under your seat for the emission diagram it will tell you where it gets plugged into..

 

I have a set of '86 VF500F 49 state carbs. In comparison to your pics, I'm reasonably sure that yours are CA models. The nipples that you have circled in blue are fuel inlets. Don't know what the hose circled in green is. I can see in the pics that there are plastic vent line connectors between each of the two sets of carbs. They should be teed together and a vent line out of the tee, or perhaps, a line from each tee to the air filter base. The nipples circled in red are most probably for hoses going to the PCV valve, nipples on #1&3 and #2&4 teed together, two lines to the PCV valve. I've no experience on the CA carbs, I am getting this info from the FSM. Hopefully someone that has better knowledge on this can chime in with more info.

 

Are 100% positive on the blue being the fuel connections? I could have sworn when I disassembled the bike the fuel line was hooked up to the black one between the carbs. The bike sat for a long time so it's possible the previous owner had things assembled incorrectly. It wouldn't be the first thing I found that was wrong.

 

On the set of '86 carbs that I have, the ones you have in blue are definitely the fuel inlets. A single fuel line comes from the petcock into a "Y" fitting for the two inlets. BTW, the vacuum line for the petcock on my '86 engine was connected at the cylinder head vacuum port for #1 carb.

 

So this port is what goes to the vacuum for the petcock?

 

That's the one.

 

Double-confirming creaky, yes, the blue-circled fittings are connected to incoming fuel lines.

 

Funny thing is that my 86 miniceptor had the same thing. This was wrong. It caused the carbs to overflow and have the bike run rich at best. Flood the cylinders at worst. This is because the black plastic pieces running in between the carb banks are float bowl vents and when fuel enters through there, it bypasses the float needles and doesnt prohibit flow when the floats are fuel. Not too great to have. I'm surprised my bike never hydrolocked.

The red nipples are for the pcv valve, as creaky had already put, and the green nipple is supposed to have a vacuum hose going to the pcv valve as well. It a vac operated valve, so this is what gives it vacuum. At least it was plugged off so as to not have a vacuum leak.

To sync the carbs, you need to unscrew all the vacuum screws on the side of the head (in similar position as the nipple used for the vacuum line on the petcock) Then you can hook a manometer up and sync the carbs. That is, if you have a tool to reach the sync screws on the bottom of the carb bank.