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XR400R whirring sound.

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I have a 2001 Honda XR400R. It has a whirring/grinding sound in the lower end and a vibration in the top end. I pulled the valve cover and everything looks good. Decompression lever looks to be in order. Anyone know where I should start looking or just rebuild the whole engine. Ballin on a budget, but really love this bike. It looks like it’s new otherwise. Oil was jet black and thin. Thanks in advance! 

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my 98400r had a whirring sound in the bottom end, it was the bearing in the clutch pressure plate $20 for a new bearing and the noise is gone. a cheap easy place to start.

other than that it could be a number of things? its hard to say with out hearing it.   you say black oil came out, any chunks/filings???

I hope you find the problem and its not serious. good luck and let us know how you got on...... cheers          no. 18 in the pic.

xr400 clutch.png

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no problems glad to help.  I hope your problem is not to serious.... let us know how you got on..... cheers:cheers:

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