This has been on the forum before but I can't seem to find it. I've got a slight oil blow by problem and can't seem to find the solution. Would someone have pictures and instructions on how to re-route the vent lines so that it just goes out to the street and not through my air filter?
I hope you find what you're looking for here: Crankcase Breathers - Harley Davidson Forums - HDTalking.com
How much oil are you running? many will run 1/2 qt lower then what the book calls for. If running to full it will blow out the air cleaner. I just rerouted mine and let it dissipate in the atmosphere. Read the posts that Dr. Doolittle posted and that should walk you through it, pretty simple.
I had the problem in my 08 FLHT and it was because I accidentally overfilled it with oil during a change.
Crankcase Breathers - Page 2 - Harley Davidson Forums - HDTalking.com Read here, there are some good pictures here also from dolt