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Will xj750j fork springs fit xj650j?

Discussion in 'XJ Technical Chat' started by 750MaximSeattle, May 30, 2019.

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  1. 750MaximSeattle

    750MaximSeattle Active Member

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    I’d like to use fork springs from 750 Maxim and install in 650 Maxim. Same dimensions? Any issues i might encounter?
    TIA!
     
    750MaximSeattle, May 30, 2019
    #1
  2. Toomanybikes

    Toomanybikes Well-Known Member

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    You probably have both on hand only way to know is give it a try. Or just swap the entire fork, wheel and brakes.
     
    Toomanybikes, May 31, 2019
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  3. Kickaha

    Kickaha Active Member Premium Member

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    Why do you want to do that? are you looking for a stiffer spring rate?
     
    Kickaha, Jun 1, 2019
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  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    650 G and H 606mm 650J 467 mm

    750 J and K 458.5 mm

    so length wise 750 is shorter than 650J
     
    XJ550H, Jun 1, 2019
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  5. 750MaximSeattle

    750MaximSeattle Active Member

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    Tomorrow, I take delivery of an xj650j project, which has sagging front springs. I'm considering pulling springs from xj750j forks with bent tubes. By the way, once those fork tubes are removed, I'll probably offer the lowers for sale.
     
    750MaximSeattle, Jun 1, 2019
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  6. Toomanybikes

    Toomanybikes Well-Known Member

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    If forks are sagging then install longer sleeves and heavier fork oil
     
    Toomanybikes, Jun 2, 2019
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  7. 750MaximSeattle

    750MaximSeattle Active Member

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    Oil is probably low, both seals leak. I have new seals to replace them. Could low oil alone cause the front to sag?
     
    750MaximSeattle, Jun 2, 2019
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  8. k-moe

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

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    No.
     
    k-moe, Jun 2, 2019
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    Toomanybikes and 750MaximSeattle like this.

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