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Can you hear this engine rattle?

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I am putting in a new top end. I am hoping that gets rid of that noise but I still don't know for sure if it was piston slap or worn wrist pin bearing.  I would just like to know the source of that sound.  I hear that a lot when looking at used bikes.

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like i said, mine made the same noise, and no matter what i replaced it didn't go away. my cr125 was raced hard and never had a rod failure or any sort of wristpin bearing problem.

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