my 98 warrior has had a popping and backfiring sound ever since i bought it. It runs fine it just doesnt want to stay at one speed when driving it purges & jumps. im pretty sure the jetting is correct since the plug is a good color. My local yamaha repair man said that he has replaced several pickup coils on the warrior this year and it has solved this. I can get just the pickup coil for 40$ from rickystator instead of buying the whole stator so im prolly going to do that unless someone else has a different idea...also it doesnt have a parking brake so its not that does this sound like the problem??

 

the parking brake issue.. it won't let it rev.. it'll just sputter adn die(low rpms)

 

it doesnt sputter down and die it runs fine just sputters & doesnt run as smoothly as it should. "...also it doesnt have a parking brake so its not that "

 

anyone else???