My S1W has a slight oil leak that seems to be coming past the front cylinder exhaust header gasket. The bike has down 20,000 mls. Only thing I can think of is either the exhaust valve guide or the valve guide seal. Anyone had something similar? I shall be removing the exhaust headers to have a look inside that part of the head.

Guide seals will have failed about 15000 miles ago if they're the originals, I'd bet. Could be running down from the rocker box though.

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Try doing this to yer fueller...........