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Strange noise

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I just put the motor back together on my bike for the second time... I replaced the crank and the first time the idler gear that runs the oil pump came off the shaft that runs on. I heard it in time to shut the bike down before any damage occured.

Now that I have addressed that and put it back together it is making a strange noise. It is a whirring noise. I've attached a video but the audio is not that great. Maybe some one else has had the same problem and can help me out. Otherwise, I'll be taking the motor out of the bike again and pulling it all apart again. I did drain the oil and saw no metal in it or the filter, I also pulled the clutch and flywheel covers and didn't see anything obvious.


Thanks in advance for your advice.


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