Oil from hole on jug, kick ARM side.

2002 wr426. I noticed oil stain on the side of jug, doesn't gather. What is this hole for?

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That's the spark plug weep hole.  If oil is coming out of it, the oil would have to be leaking into the spark plug recess first.  Like from a valve cover gasket.  

It is normal for fluid to exit that hole....from riding or washing.

Makes sense, I lost compression from bike sitting,, poured cap of oil down plug, got compression back,,,, oil was probly sitting in that plug pocket.

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