Have about 6,000 miles on my DL1000. Looks like I have oil leaking out between the bottom part of the cylinder head and the transmission. Don't see liquid oil, but a dirty oily substance about 1/4 inch wide and about 3 inches long on the left side of the cylinder head. Is there a easy fix, or do I need to take it to the dealer? Should I just live with it, until I need tires, or seek help before then?