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Yamaha XJ 900f Exhaust Replacement

Discussion in 'XJ Technical Chat' started by Franz, Aug 11, 2017.

  1. Franz

    Franz Well-Known Member

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    Hi XJ Owners

    I got a Motad 4 into 1 for my XJ 900f after a driver ripped my old exhaust off my bike. When I was fitting the Motad the threaded fixings on the head were too short to allow the nuts on to secure the header pipes. I have round copper gaskets, were the original Yamaha exhaust port gaskets flat in section? If so that could be the answer to this. What is your opinion on this thanks?
     
    Franz, Aug 11, 2017
    #1
  2. adrian1

    adrian1 Active Member

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    No offence, Are you sure the old gaskets have been removed. More than one person has fallen for that - they are almost invisible! In any event, Chacal will see you right.
     
    adrian1, Aug 12, 2017
    #2
    TheCrazyGnat, k-moe and Toomanybikes like this.
  3. Franz

    Franz Well-Known Member

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    Thanks Adrian for your replay, yes the old gaskets are out of the ports.
     
    Franz, Aug 12, 2017
    #3
  4. Franz

    Franz Well-Known Member

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    Reply I mean lol.
     
    Franz, Aug 12, 2017
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  5. k-moe

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

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    The original gaskets are flat. What profile do the Motad headers have at the exhaust port end?
     
    k-moe, Aug 12, 2017
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  6. Franz

    Franz Well-Known Member

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    Hi K-moe the Motad headers open slightly wider than the header tube, like a slight trumpet shape. I think flat Yamaha gaskets would be better.
     
    Franz, Aug 14, 2017
    #6

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