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post #1 of 5 (permalink) Old 03-07-2019, 03:36 PM Thread Starter
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New Bike

I just bought a 2009 Vulcan 900. I got it out today to clean and look things over and let it run to check things and saw what looks like oil coming from the bottom of the cover. Any ideas before I take to a shop? Thanks.
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post #2 of 5 (permalink) Old 03-07-2019, 04:08 PM
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A very small amount of oil present inside the air box is not at all uncommon, but it sounds like there is more than just a small amount. Carefully check the engine oil level and make sure it is at the prescribed level...if the level is at or above the upper level mark, it can cause this problem. A Mityvac is a good tool to have to suck out some oil. Remove the air box cover and clean it up. Make sure the gasket is seated properly during reassembly.

Refer to: https://www.vulcanforums.com/forums/...rchid=12133218 or do your own search.

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post #3 of 5 (permalink) Old 03-07-2019, 08:24 PM
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The oil is coming from the crank case vent reservoir which is a little rubber "cap" (for lack of a better term) that catches the small amount of oil vapour that comes out of the crank case. It is located in the air box and needs to emptied on a somewhat regular basis.
Since you said your bike is new to you it probably wasn't emptied in a while, was full, and leaked out into the airbox.
Take that cover off and take a look you'll see what I mean. It's located near the bottom

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2006 Vulcan 900 Classic
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post #4 of 5 (permalink) Old 03-07-2019, 08:27 PM Thread Starter
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Thank you for the advice. I'll check it out tomorrow.
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post #5 of 5 (permalink) Old 03-08-2019, 11:21 PM
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In addition to what has already been said, there are 2 thin rubber gaskets on either side of the air filter element. I clean out the little oil catch cup (about thimble sized) with cotton swabs. Those 2 thin gaskets get flattened over time (they are not expensive) and replacing them helps to keep the oil inside the air cleaner, so it won't run out on the bike. AFAIK, this slght oil leakage from the crankcase vent is normal for the 900, and you do have to do about 5-10 minutes of maintenance for this once in a while.

Last edited by jbiggers; 03-08-2019 at 11:24 PM.
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