21mm Carburetor Help!!

[magoconnor]

Hello.

My bike was running okay, till I installed a 21mm phbg racing carburetor.
Now it has trouple starting, and when it does you have to keep it alive with the throttle, but it can hold idle, after a few seconds.  
When I try to take off, it just sputters and then dies out .
I have tried to adjust and try different kinds of settings, but nothing seems to work.

It has a au atomizer which is used on two strokes, but i have talked with dellorto, they say it's fine.
My main jet 90
Not sure about the neddle.
Atomizer au 262
Choker 60 
Idle unkown
 
Please help me out! 

My Setup:
Gy6 engine 50cc 
72cc kit 
racing camshaft
polini variator 6,9g
naraku alu manifold intake spacer
racing manifold
aftermarket racing clutch, stock torque spring.
OPEN AIR FILTER (rough grid foam)
SlS system removed.
All restrictions is removed
removed the vacuum fuel delivery system. 

[90GTVert]

Do you have different main jets to try, and have you tried swapping main jets?

www.49ccscoot.com/faq/carbtune.html

[FrankenMech]

Go back to the original carb setup.

[magoconnor]

I swaped out the main jet for a size 80.
Now the scooter runs much better, still needs to be fine tuned.
Thanks for the help.