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V-Ductor Question

Discussion in 'Motorcycle Tech Talk' started by Yachtman, Mar 21, 2010.

  1. Yachtman

    Yachtman New Member

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    On the V-Ductor install, I've run into a possible snag. As seen in the sig pic below, I had to place a spacer (on each side) between the backing plate and the breather bar/crossover plate that attaches the carb to the manifold/bike firmly. I did this because otherwise the top of the carb tilted backwards, therefore creating an uneven attachment to the seal. I could feel it and see it. I would think this would be an issue no matter which backing plate is on your bike, even though I know mine is older. Would there be a better choice for backing plates? I'm trying to keep originality.

    Has anyone else experienced the same problem? And for those with more experience than I, which is most of you I'm very sure, is this just the way it's going to be? Which is ok, I just want to find out before I take it apart, again. I'm going to be taking the carb off and tearing it down to find an error in my work rebuilding it to fix another issue. So I'm (again!) looking for any siggestions, please. If you're in my neck of the woods, I'm buying!

    Please see the attached photos below.

    Thanks very much, again!!

    Robert

    Attached Files:

    Last edited: Mar 21, 2010
  2. chucktx

    chucktx Moderator Staff Member

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    is the backing plate hitting the cross over breather bar??? this is why your spacing it??? that is not correct. has this been a problem or something that happened when you started the carb work???
  3. Tomflhrci98

    Tomflhrci98 Active Member

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    When you add the V-ductor - the carb should be able to slide evenly into the intake gasket the same thickness of the V-ductor. If it is done evenly the carb should be level with the backing plate.

    I understand what you did. I don't think the set up the way you have it with the spacers will hurt anything. That is if the spacers are the same thikness as the v-ductor. However, like I said, you should have been able to push the carb into the intake gasket that little bit if you work it back and forth a little as you press on it.

    I hope this makes sense.
  4. Yachtman

    Yachtman New Member

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    Tom, any further and the carb would be past the detente in the rubber seal.

    Chuck, the Ductor has a thickness of approx 1/8", pushing the plate away from the carb the same distance, therefore pushing it away from the crossover bar the same distance, and also away from the carb/manifol seal itself the same dist. No?
    Last edited: Mar 21, 2010
  5. Yachtman

    Yachtman New Member

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    Today I took out the spacers between the crossbar and the backing plate. The pictures show the gap due to the V-Ductor. The carb is in as far as it will go, and feels very even.

    Attached Files:

  6. Lucifer

    Lucifer Well-Known Member

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    I think you got 'er now...just slide the shims you have that are the same thickness of the V-Ductor between the backing plate and mount bar and you should be good to go.
  7. chucktx

    chucktx Moderator Staff Member

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    ok, now i see what your talking about......i agree with lucifer, use the spacers......i didnt have that problem.....wish i could see it first hand............
  8. Tomflhrci98

    Tomflhrci98 Active Member

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    I had the same problem, and like I said earlier, I just pushed the carb into the intake gasket until it was flush. Everyone must have to do this when you add the thickness of the V-ductor.

    However, like you said, as long as he aint got no leaks the spacers shouldn't be a problem.
  9. NeilP

    NeilP Active Member

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    I had a similar isssue, but not such a great gap. It is bound to happen when you add the extra thickness of the V-Ductor.
    Spacers sould work fine as would trying to work the carb back into the inlet manifold mount a little further witha smear of vaseline or red rubber type grease.
    I also made myself 2 thinner gaskets using gasket paper and a smear of sealant on one side of the gasket and vaseline on the other side .

    Looking at your pictures, the gap you have there looks greater than the thickness of the V-Ductor plate and the extra gasket anyway. Are you sure the carb is seating all the way back. When I fitted my V-Ductor first I alos had a bit of a gap, but taking the carb out and putting it back with the Vaseline did reduce it some as it managed to seat in the rubber manifold better.

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