Oil in air filter - Harley Davidson Street Forum - Street 500 and 750
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post #1 of 6 Old 08-09-2019, 12:56 AM Thread Starter
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Oil in air filter

Anyone else getting oil in their air filter?

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post #2 of 6 Old 08-09-2019, 03:38 AM
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I have after a long hard ride with friends had it happen a couple of times - very small droplets gather at the bottom of the air filter case.


I have asked a few people who have advised me that it is normal for Harley's to do this as the 'crank vents through the filter inlet?'


As my bike is running fine I have accepted this explanation but really don't know why it does happen.
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post #3 of 6 Old 08-09-2019, 01:34 PM
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My other Harleys did this as well. Not an issue..
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post #4 of 6 Old 08-11-2019, 07:36 AM
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Number 1 cause is over filling the oil.
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post #5 of 6 Old 08-11-2019, 09:53 AM
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Not a problem.
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post #6 of 6 Old 08-11-2019, 08:53 PM
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Guess even car air filter after sometimes will have oil residue, it’s normal unless the oil you describe are like 1 tablespoon !
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