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Oil leaking out of air box

Evo Classic Models - Harley Davidson Forums - www.hdforums.com
I've got a 1991 FLHS. Recently I have noticed a LOT of oil leaking out of the air box. It mists the fairing that covers the oil tank. When I get home from a ride the fairing covering the oil bag will have a coating of oil on it and oil will drip out of the bottom of the air box and onto the motor. It doesn't leak oil when it is sitting, just when it is running and just from the air box. It seems to be pushing oil out of one of the vent tubes that vent into the air box. Has anyone else had this problem?

Is it a blow by problem? Is one of my cylinder sleeves or piston rings letting oil through or something? It isn't burning an oil and is very strange to me. I can't figure it out.


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