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Middle gear had no oil deal. xj650rj rebuild

Discussion in 'XJ Technical Chat' started by Andrii, May 5, 2019.

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Do I install it just like it was when I took it apart?

  1. Yes, I what to see how much oil you lose...

    0 vote(s)
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  2. No, you idiot..

    1 vote(s)
    100.0%
  1. Andrii

    Andrii New Member

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    *oil seal

    Hey everyone. I need help. I am rebuilding my 1982 xj650r seca and while trying to assemble my gear components together i have noticed that my middle gear did not have oil seal installed from biggining (see pic attached). On the IPB it shows that there must be an oil seal there (it is #32). I have been trying to find that seal online but no luck so far. I was wondering if any of you know if that seal was not installed on factory or removed for a specific reason (like to lubricate outside portion of middle gear ‍♂️. I am just guessing at this point). Please let me know if you know anything about it.

    Thank you.
    V/R Andrii

    20190505_023423.jpg
    yamaha-xj650r-seca-1982-c-usa-transmission_bigyau0792c-6_e39a.gif
     
    Andrii, May 5, 2019
    #1
  2. XJ550H

    XJ550H Well-Known Member Premium Member

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    contact www.xj4ever.com he should have the seal

    this should be the part ask @chacal send him an email

    HCP6080 OEM middle gear output housing OIL SEAL, fits on the output shaft where it exits the crankcase housing. For all XJ650, XJ700, XJ750, and all XJ900RK, RL, N/FN, and F engines.

    HCP20943 Aftermarket middle gear output housing OIL SEAL, fits on the output shaft where it exits the crankcase housing. For all XJ650, XJ700, XJ750, and all XJ900RK, RL, N/FN, and F engines.
     
    Last edited: May 5, 2019
    XJ550H, May 5, 2019
    #2
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  3. Colin 85 700

    Colin 85 700 Active Member

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    Woah! Ya, dont know how thats missing!
    +1 on xj550, get one from chacal, it will fit!
    Otherwise it will take a lot of oil to fill your driveshaft housing! ;)
     
    Colin 85 700, May 5, 2019
    #3
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  4. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    You won't lose any oil. That seal dosen't open to the outside of the case.
    It does need to be there to ensure that there is a sufficient volume of oil for the bevel gears to run in.
    The seal makes sure that oil does not drain back to the sump on the clutch side.

    Oil won't get into the driveshaft housing either. The output shaft has an o-ring on the bearing carrier.
     
    Last edited: May 5, 2019
    k-moe, May 5, 2019
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  5. Andrii

    Andrii New Member

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    So should I even bother getting that oil seal from @chacal? Or do I just install as it was before since it is not doing anything anyway?
     
    Andrii, May 5, 2019
    #5
  6. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The seal should be installed. That bevel gear works just like a ring and pinion on a car. Less oil means a much shorter life, and I doubt that you'd like to open the bottom end up again.
     
    k-moe, May 5, 2019
    #6
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  7. Andrii

    Andrii New Member

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    Hey everyone, just got back to my project and realized that my manual tells me that oil seal mentioned above is not installed on all xjs. #26- oil seal*. And that star refers you to the note that tells you "fitter to xj650...RJ..." that is what i have. (If XJ650RJ means XJ650 R Seca). But that makes me think that #26 oil seal was not installed from factory. So I am still not sure if I have to get a seal for it.
    Anyone have any thoughts about that????
    20190510_000108.jpg
     
    Andrii, May 10, 2019
    #7
  8. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The service manuals all have errors. I believe that to be one of them. The RJ suffix is the U.S. delivered Seca 650.
     
    k-moe, May 10, 2019
    #8
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  9. XJ550H

    XJ550H Well-Known Member Premium Member

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    your bike is listed in the fitted to list
     
    XJ550H, May 10, 2019
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