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Need some '82 XJ1100J Exhaust Valves....

Discussion in 'XJ Technical Chat' started by mikeames, Jan 26, 2015.

  1. mikeames

    mikeames Member

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    Does anyone happen to have a couple of exhaust valves from an '82 XJ1100J that they can get rid of?
    Turns are I did manage to bend a couple while doing some maintenance...
     
    mikeames, Jan 26, 2015
    #1
  2. mikeames

    mikeames Member

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    Makes me wonder if it is possible to straighten slightly bent valves? Seems like if you chucked one in a lathe and lightly tapped then checked then tapped then check you could get it straightened out...
    Anyone ever tried it?
     
    mikeames, Jan 26, 2015
    #2
  3. FtUp

    FtUp Well-Known Member

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    there are a couple new ones on ebay, but you should probably pick up this head instead...

    http://www.ebay.com/itm/Yamaha-1980...Parts_Accessories&hash=item2c92d61641&vxp=mtr

    these guys could probably make what you need...

    http://www.ebay.com/itm/Yamaha-FJ-F...Parts_Accessories&hash=item2a3305e106&vxp=mtr

    http://www.ebay.com/itm/82-YAMAHA-X...Parts_Accessories&hash=item1e93153587&vxp=mtr

    if they are very slightly bent, you could probably have a machinist regrind the seat faces. I would not recommend hitting them with a hammer.

    FU
     
    Last edited: Mar 1, 2015
    FtUp, Jan 26, 2015
    #3
  4. k-moe

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

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    You can straighten a bent valve, and it will work....right up to the point where it fails and grenades your engine. It's not a trick that I would recommend using unless there is a pile of cash for you if you finish first, or you're stuck deep in the woods.
     
    k-moe, Jan 26, 2015
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  5. mikeames

    mikeames Member

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    These are barely bent...you wouldn't even notice it unless you roll them on something flat and look real close...but I am a bit concerned about having distressed the metal when I bent them
     
    mikeames, Jan 26, 2015
    #5
  6. rocs82650

    rocs82650 Well-Known Member

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    The valves and guides are a close fit. Isn't the 1100 a one year model? Imo replace them.

    Gary H.
     
    rocs82650, Jan 26, 2015
    #6
  7. Kickaha

    Kickaha Active Member Premium Member

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    A lot of valves are made in two pieces and any time they are bent no matter how small is the start of them failing and dropping the head off
     
    Kickaha, Jan 27, 2015
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  8. mikeames

    mikeames Member

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    I decided to buy a used head off of Ebay. It was about $100 shipped and should either be usable or have enough parts that I can make some combination work.
     
    mikeames, Jan 27, 2015
    #8

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