At around 1000mi my chain started to squeak, (I clean the chain every other tank and spray some chain wax on it) even with cleaning, I still had noises. It was also getting pretty hot, I could see with my thermal camera that the chain was about 100°f hotter than the sprocket. After about 1500mi it stopped squeaking and never got hot again. Sounds like it might have been rubbing on the chain guard and finally wore to the point where it stopped rubbing... I'm going to put a nice x-ring DID chain on it next.