I am running a 25/60 Super Z with the Kaw 25. The last couple days i've been mowing, i noticed a different noise. After a day of mowing, i idled down and just listened to the motor to hear a random "clanking" coming from the motor. Has anyone ever heard of this, or maybe not be as bad as I am thinking?? I am taking it the the dealer to get it looked at Monday. I am hoping the warranty is still in effect. What is the warranty time on the engine? Any help is welcomed!!!