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Thread: Buell xb12xt oil drips unknown area

  1. #1

    Buell xb12xt oil drips unknown area

    I just bought a 2009 Buell xb12xt 25k miles

    Been doing some fixes. Bought a Buell tooth as well and reading a lot on this forum. This is my first post here.

    Can anyone please help my target where this oil drip is coming from? It looks like itís near the belt pulley area. Itís not the rear cylinder head or the pcv valve.

    EACDF33C-E878-4415-8DBB-B1B8B2FD2068.jpgEACDF33C-E878-4415-8DBB-B1B8B2FD2068.jpg0C5BD50E-5B06-4C82-A539-1C9F332A43F5.jpg

    I do have a slight melt on the trans breather hose but I donít think the oil is from there.

  2. #2
    Anybody?

  3. #3
    Two possible sources - the rear valve cover PCV grommet (or the hose connection to the PCV), and the breather hose - up inside where it might be touching the rear exhaust pipe. My '08 had all three.

    I didn't find the last one until I changed the starter.

  4. #4
    Senior Member Barrett's Avatar
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    Possibilities:
    Primary/trans breather hose loose at fitting
    Primary/trans fluid level way too high
    Starter motor sealing ring leak
    Rear cylinder rocker box lid breather grommet/breather assembly cracked or grommet bad or hose dislodged
    Oil pressure switch leaking
    Tighten all the cam/pump cover bolts in sequence-Cam/pump cover is the large oval array on right side with "thunderstorm" decal affixed to same

  5. #5
    I’ve been reading on the forum where a guy had a similar problem and it was the starter. I don’t know why some people call it a “stator” I may be wrong. Is that a costly fix? Thank you

  6. #6
    I’ll check all those. Thanks

  7. #7
    Senior Member Barrett's Avatar
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    Quote Originally Posted by Hypefxx View Post
    I’ve been reading on the forum where a guy had a similar problem and it was the starter. I don’t know why some people call it a “stator” I may be wrong. Is that a costly fix? Thank you
    The starter motor is a Mitsubishi Electric component. It is bolted onto the left side engine case and engages the ring gear on the outside of the hub assembly, spinning the engine over to start it. Has its own sealing gasket/O-ring and if leaking, will leak in vicinity of your green circled area.
    Your XB has an alternator assembly virtually identical to Harley Davidson XL/XR models. It consists of a magnetized rotor spinning around the outside of an AC voltage stator. The stator is affixed to the engine case via hardware. These components are contained INSIDE of the primary cover towards the front. The starter motor is externally mounted. Capiche?

  8. #8
    Very well explained. Thanks so much. I did find that the trans breather bolt kind of loose. I was able to turn it twice to tighten it up. I just degreased everything and will go for a drive and see if oils are still dripping.

    This is such a great forum. I will keep you guys updated on the issue

  9. #9
    Update

    Drove 20 miles after degreasing it yesterday.
    Still have oil leaking same area but slightly less.
    I bought a UV dye from Amazon and will get it soon. Hopefully an easy repair

  10. #10
    So Iím still investigating where this oil is coming from. Itís probably the starter gasket seal potentially. But when I was removing the airbox and I see the last owner did the breather mod wrong.

    He had the front pcv into a tee and into another tee connecting the rear pcv and crank together.

    Basically the pcv is spitting out oil into the crank breather hose which is probably why the oil overflow trickles in that area. That is just a theory.

    I will Speedtest the crank hose from the pcv tee now and see if that helps



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