trommy

I had an 87 warrior a few yrs ago.Same problem...The (expensive)tube manifold connecting the carb to the head gets cracked letting air in.G'luck. Trommy

I'd almost bet the farm that you got water in one or more electrical conections involving the ignition circuits.Most likely though it is a bad (or loose)spark plug boot since it still starts.If it's bad or loose,then this sympton would occur when wet because the water would get at the spark plug shorting it out.G'luck Trommy