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