Believe or not I have Kawasaki FX751V-DS04 that has carburetor developing ice @ 90F and 90+% humidity. Engine hard to start right after shut down. Sit a few minutes and start right up. Carburetor is cold to the touch and is sweating on it exterior.
Not a coil, plug or carburetor problem. Has new coils and plugs. And carburetor has been rebuilt after a suspected fuel leakage.