Lower rocker boxes to heads had a minor oil leak that was burning onto the rear head pipe heat shield. Both were leaking at the forward side of the rocker boxes. I checked the torque before I removed anything and the lower rocker box bolts to the heads were loose (#3's & #4's). Also found oil inside the air filter, most likely the breather valve (see video below) as the rubber valve (#34) was pretty hard after twelve years. Degreased all the bolts and threaded holes, used blue Loctite. I put on another two hundred miles and no more oil leaks. Not a difficult job but it is time consuming.

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