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Upper Fork Tube Straightening

Discussion in 'XJ Technical Chat' started by jayrodoh, Feb 3, 2016.

  1. jayrodoh

    jayrodoh YimYam

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    I've researched this online (grain of salt obviously) and gotten conflicting info. Some say never do, some say a little run-out can be straightened. My build is stalled at the moment as I discovered one upper tube is bent slightly. I don't have v blocks but when the tubes are placed together there is about 1/16" between them in the middle when I orient it so the inside of the curve is towards the straight one.

    Common sense says I don't want to be flying down the road on something straightened but I'm no expert on metal fatigue etc.
     
  2. XJ550H

    XJ550H Well-Known Member

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    this is all my manual says about it no spec
    runout.PNG

    and from haynes
    forkh.PNG
    still no standard of strightness
     
    Last edited: Feb 3, 2016
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  3. jayrodoh

    jayrodoh YimYam

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    Thanks. Got my eye on a few forks on eBay, also posted here.
     
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  4. Kickaha

    Kickaha Active Member Premium Member

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    I've straightened a few, easy to do with a press and v blocks, but I'd only do it so long as there are no creases in the leg
     
  5. mlew

    mlew Well-Known Member

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    That small amount of difference can be straightened if you have the proper tools. If you don't have V blocks, a dial indicator and a hydraulic press just get another pair.
     
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  6. TheCrazyGnat

    TheCrazyGnat Well-Known Member

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    I was in an accident and my forks were slightly bent. The shop I took it to straightened them and I have been riding on them fine for a year without any issues. I can't say whether or not it is a good idea, but it seemed to work for me. Here is a picture of one of them that they sent me before straightening, I couldn't find the others.
     

    Attached Files:

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  7. jayrodoh

    jayrodoh YimYam

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    Wow, that is bent quite a bit more than mine. Sounds like if done properly and the tube is a candidate, its not a terrible idea. I don't have the tools nor am I interested in purchasing them. Not something I'd use much.

    I put some low offers in on a couple sets on eBay, one guy bit so I have a two complete forks on my way. They had a video of the bike that was parted, sad to see that. It was complete, in nice shape, and even had some video of it being ridden.
     
  8. TheCrazyGnat

    TheCrazyGnat Well-Known Member

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    I think they charged something like $60 to straighten them. The shop apparently looked for forks a little but didn't come up with anything immediately so decided to go with straightening. I probably would have just bought some used ones like you are if I was doing it, but I had the shop do all the repairs so I had a legit bill to send to the lady that hit me.
     

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