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progressive fork springs

Discussion in 'XJ Technical Chat' started by Polock, Nov 25, 2012.

  1. Polock

    Polock Well-Known Member

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    i got my seca fork springs for being a good boy this year and found the spacers that came with them are way too short.
    anyone else run into this?
     
    Polock, Nov 25, 2012
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  2. Thrasher

    Thrasher Member

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    Should have got straight wound Sonic springs.
     
    Thrasher, Nov 25, 2012
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  3. Bushy

    Bushy Active Member

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    Yep. maybe they are for some BMW or such that they also listed for. Made my own, after a coupla variations and ended up with 85mm which gives about 30mm of static sag. That was after checking i had the right springs in the right box with the right number on it.
     
    Bushy, Nov 25, 2012
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  4. Polock

    Polock Well-Known Member

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    i took a guess and came up with 80mm, close enough. but it's too cold now to give it a test.
    two reasons i didn't go for the sonic springs.
    never heard of them
    they don't list them for a xj750 or 650 or 550, maxims or secas
     
    Polock, Nov 25, 2012
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  5. CaptNemo

    CaptNemo Member

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    Yep,
    Was a few years ago so I am fuzzy on the details. I communicated with Len and the progressive customer service and came up with this. I honsetly don't remember how I calculated this, but 60mm works fine, I'm sure 80mm would be great. Don't know if any better info has come out in the last 3 years.
     

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    CaptNemo, Nov 25, 2012
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