Leaking fuel line fitting? Or gasket leak?

sounds like a stuck float...it may have a hole in it...

That is where gas spill out...
I took off, check the float and it look good to me..
Going to check valve adjustment and everything again. Hope I will find something wrong.

But gas is supposed to go in there...

floats can look good, For most people you shake it and listen for gas in the float

In your case, put the floats in a bucket of water and look for bubbles. Bubbles mean a pin hole leak. I agree with Billy, that is a classic sign of a bad float

Checked and no bubbles. it might something else.. IDK.

I think Float in water doesn't tell you what float in fuel may be happening.. as fuel is way thinner than water.

but those carbs look brand new.. so a hole in the float may not be on the menu..

A sticky needle and seat..may be also..

but maybe I've missed the statement.. but you think it's leaking down the throat?? how do you know this?

what are the symptoms you are dealing with??

No luck, double check everything and not sure what wrong. Might be carbs or something esle. Anyone can help me out what wrong with it?

Scroll down to page 16 it shows you how to adjust the float.
http://www.type2.com/~keen/webertech/idfsetup.pdf

Stuck or clogged fuel cutoff needle... ??

Had a similar problem with my kadrons (I know, not the same...) took me a while to find it, the pin in the cutoff needle/seat was stuck in the closed position. Fuel would not enter that carb, as if the float bowl was full.