XJ650 Fuel Lines and Petcock for Engine Test Fire

I'm trying to put together the fuel system in order to test fire the recently rebuilt engine.

Does anyone have any photos or videos of testing a motor without putting it back in the frame? I'm thinking of using a temp fuel reservoir and tubing, but if I can figure out which one will be the bet to use and set up the filters/petcock/etc at the same time and test them out that would be ideal.

The bike came with the original petcock and fuel pick-up (not pictured/ it's pretty chewed up and just was in a spare parts bag), a second one installed on the fuel tank, and then a third brand new one, but I have no idea which will be the best one to actually go with. I saw some discussion about a vacuum triggered/primed one vs not, but all I have are these pieces and no real idea of what is supposed to be capped off, or which hoses go where.

I'm assuming that the final fuel line connects to the carbs at the 'T' inlet between carbs 3 and 4. If I just want to test fire, can I just gravity feed from an old water bottle of fuel through the filter and petcock?

If anyone can snap a photo of the way this is normally assembled and connected that might be enough for me to work with. It sure makes it more difficult when you just get a bunch of pieces and no idea how they are supposed to fit together.

 

Basically.
The vacuum controlled petcock is to thwart any issues with the float valves sticking when the bike is not running.
It is attached normally to cylinder 2 but any of them wouldn't make a difference.

If your only testing none of that is an issue.
The T-peice is the intake for the carbs.
Just make sure you have all the ports blocked on the inlet manifolds and have fuel in the bowls.

If the float valves stay open in the carbs the fuel can end up in the oil but only if the bike isn't running.

 

Thanks for the pointers. What did you mean by 'all the ports blocked on the inlet manifolds'? Are these on the carbs somewhere? I think I installed all the pieces on the carbs, so if I need to tape something else, please help me with where these are?

Also, where on cylinder 2 does the vacuum outlet sit? I don't remember seeing anything in the valve cover or or any where else that would be under vacuum?

 

Inlet manifolds are the rubber bits that bolt on the head and the carbs slip into.
They have a barb/nipple poking out for vacuum balancing etc and are all capped normally, bar one which has the hose going to the vacuum petcock.

If you don't cap them then the bike probably won't start, and definitely won't run well even it it does, as it will just suck air through the barbs.