I don't think that applies.
On the top of the needle valve is a little pin, the one you hooked on the float. That's supposed to be spring loaded. Is yours spring loaded and does it operate smoothly?
With the float attached to the carb and with the bowl off turn the carb upside down so the valve closes. When it's in this position when you blow air in a hose attached to the fuel inlet on the carb is the valve sealed or leaking air when blowing hard?
dies the needle assembly move smoothly in the seat or dies it bind.
there really is not much that can cause this.