While riding this weekend, I thought I could hear something rattling but I had helmet on and nothing sounded wrong with the bike so I wasn't too worried. Pulled the quads off the trailer today and while it was cold and idling there is a definite clanking in the bottom end of the motor. I WANT TO SAY it only happens when the clutch is pulled, but I can't say that is 100% accurate. I'm going to wait for it to cool down again and then make a video of it so you guys can hear it, but I heard from the garage and the quad was 50 feet away in the street. It went away when it warmed up. Anyone have any ideas?!