So being the nice guy I am, I offered to help a friend get his Yamaha Warrior up and running. Hadn't been used in almost 8 years. Carb was nasty like you'd expect. Cleaned it, still wasn't right, ordered a carb kit, put it in, new NGK iridium spark plug, ran like a top. When sitting still. He got it home and finished installing all of the plastics and took it for a ride, it breaks up horribly under load over a certain rpm. Sounds ignition related. Stators at common failures. Just tossed one on. No dice, runs exactly the same. I'm out of ideas. Would any of you guys be able to point me in the right direction?