Fuel leaving carburetor is sucked into engine through the  *red stars*  and exits the reeds in direction of  'red lighting bolts' .

The blue arrows are pointing at the thin, stainless reeds that are pulled opened by crankcase vacuum at the appropriate time according to direction of piston travel.

The next photo may help point out some of the areas to check when inspecting for defects.

The "look in here" red arrow is a  must check with flashlight  anytime you remove a carburetor!
Often a small screw from carb butterfly or silencer box attached to front of carbs can work loose and become lodged in reed valves.
Also check then for gaps, bends, and cracks.

The red arrows on the left are pointing out areas to check if reed plate is removed from power-head.
What you want to look for are  no gaps  between reeds and reed cage, they should be flat against aluminum cage and closed tight.
Carefully inspect for cracks, distortion, bent reeds, and be sure attaching screws are tight.

The blue arrows are pointing at the reed stops which are designed to prevent reeds from fluttering, or opening too far at high speed and bending, cracking, or breaking.

Maybe you've heard someone say to flip the reeds over and re-use them if they are slightly bent.

I don't recommend trying this as changing the direction of fluttering at 4,000 or 5,000 times a minute to an opposite direction can cause broken reeds for sure.

A broken reed bouncing around on top of the pistons is gonna' cost a whole bunch more than a set of reeds!