Hi my name is shawn and I own a 2001 yamaha wolverine and it won't start with the pull cord when its cold, i pull on it and it barely does anything. I am able to bum start it and it starts almost instantly. once the bike has been running for rughtly half an hour idleing or running i can start it easily, until the engine cools down again. i changed the spark plug boot, spark plug, checked battery, checked wireing... the only thing i can see not working is the dynamo inside the motor next to the pull cord...