Question about 1972 Yamaha XS2
Probably a worn out valve seal. Maybe a bad ring. You can do a leak down test to see. Try a compression test anyway and see if the compression is still good in there. It will need a top end job most likely. Not too hard on that bike.
I'm curious as to how you know there is oil in the intake port. Are the carbs off? Most oil will blow out through the exhaust ports.
Posted on Jul 31, 2009
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Posted on Jan 02, 2017
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