2003 wr450 oil leak from head

ImageUploadedByThumper Talk1391304360.770464.jpg

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Is this common? Any ideas where this is coming from?

Thanks !

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ImageUploadedByThumper Talk1391304463.933971.jpg. The other side of the head is clean.

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Yamaha went to auto decompression in '03 and didn't change the head casting right away.  Your bike's head has a plug in it where the manual decomp used to be.  Looks like it's leaking from there.  The plug may be rubber and has shrunk a little.  Ebay has em.  

Thats it.

 

Thanks!

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