sputters and dies with throttle

[PJ650]

I have a 86 vt1100c that i bought some months ago.
It ran really rich and would backfire on deceleration, It was rideable but I was scaring people around me with the backfiring.
I bought new carb jets and installed em and put the carbs back on.
no more backfiring ( at least barely ) but now it will idle fine and I can rev it as long as I roll onto the throttle really slowly. If I snap the throttle open it just sputters a couple times then dies.
I am not sure ive got my vacuum lines right, I read that one is supposed to hang loose for atmospheric pressure, but i tried unplugging all of them, each individual end and combinations. but nothing I do to my vacuum hoses seems to affect much of anything.
I dont know if that is the problem of not.
I'm stumped.
can anyone help me?

[SkullCrusher]

Backfire at closed-throttle decel is indicative of lean condition, not rich. Stalling when you abruptly whack the throttle open suggests improper mixture. What do your plugs look like? Are your pipes/air filter etc all stock?

[PJ650]

pipes and air filter are stock. Im having trouble tracking down my spark plug socket.
I played with the idle screw a bit and speeding up the idle seems to help some. i can roll onto the throttle a little faster now but if i snap it open it still dies.

[SkullCrusher]

Unless you're at some extreme altitude its odd that the bike would need a rejet with factory pipes and filter. They usually tune them a bit lean from the factory for emissions reasons but not that lean. Starting to suggest intake leak...maybe your carb insulator boots are cracking? Shoot some wd-40 at them while it idled, see if rpm goes up. You won't know how its burning til you read those plugs.