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Thread: Shock/Fork cross-reference

  1. #21
    EBRforum ProvNov rb21's Avatar
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    The Showa race shock has the reservoir fixed on top and it's fit the 1190. Not sure if the reservoir is positioned the same or not.Name:  s-l400.jpg
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    Last edited by rb21; 06-06-2018 at 08:20 AM.

  2. #22
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    Interesting. $50 shipped for your shock?

  3. #23
    EBRforum ProvNov rb21's Avatar
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    Quote Originally Posted by LeesEBR View Post
    Interesting. $50 shipped for your shock?
    $50 plus shipping.

    or you may want to just look into adding the shims to your stock 1190 shock - that way your adjusters will still be easily accessible. They should be fairly similar and its not a big deal to do or have a suspension company do - its just some spacers that limit the return on the shock shaft. I think the shims are like $25 and you will need some shock oil and maybe a shock seal and a youtube video on rebuilding a Showa Shock. You may or may not need a shorter shock spring - on the 1125 shock I was able to grind down the pre-load collar by roughly the same length that the shock was shortened so the pre-load values should be close.
    Last edited by rb21; 06-06-2018 at 11:35 AM.

  4. #24
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    Quote Originally Posted by rb21 View Post
    $50 plus shipping.
    What's shipping to 94509? I dunno weight/size.

  5. #25
    EBRforum ProvNov rb21's Avatar
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    Probably somewhere around $25. You may be better off just doing your stock one. I really chimed in on this conversation because it was fairly easy to do - not to sell my shock. I was selling the shock before because I didn't have a bike that it would fit on - now I do.

  6. #26
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    1125 on the left, 1190 on the right


  7. #27
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    Quote Originally Posted by LeesEBR View Post
    I'm not sure the 1125 shocks work due to the reservoir being fixed at the top. All the EBR shocks have the reservoir either at the bottom or remote. Being without my bike, I can't find a picture to confirm, yet.

    Traxxion has EBR springs listed as 38x273x<rate> and GSXR springs as 37x240x<rate>. Now, both bikes use 43mm Showa BPF, so what's the first number?

    If we use 38x273x.95 stock, wouldn't a 37x240x1.0 (or 1.05, 1.1, 1.2, etc) have the desired effect? It's 1.29" shorter, and stiffer to compensate...but what's that first number and why are they different if the forks are the same diameter?
    Any comments on the fork springs?

    Lots of reading on various brand forums, 1-1.5mm difference in spring width is nothing to worry about. I just need to calculate what rate I need to make up for the missing length.

    -EDIT-
    So if our 273mm spring has a k-value of .95 kg/mm, that means at full compression of the fork the spring is under 2990 lbs of force. A 240mm spring with a k-value of 1.1 kg/mm (since 1.2 is not offered), accounting for the 1.29" loss of travel, is only under 2500 lbs at full compression.

    I feel like my math is wrong somewhere. I'll need to sit on this some more.
    Last edited by LeesEBR; 06-08-2018 at 01:08 PM.

  8. #28
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    Quote Originally Posted by LeesEBR View Post
    Any comments on the fork springs?

    Lots of reading on various brand forums, 1-1.5mm difference in spring width is nothing to worry about. I just need to calculate what rate I need to make up for the missing length.

    -EDIT-
    So if our 273mm spring has a k-value of .95 kg/mm, that means at full compression of the fork the spring is under 2990 lbs of force. A 240mm spring with a k-value of 1.1 kg/mm (since 1.2 is not offered), accounting for the 1.29" loss of travel, is only under 2500 lbs at full compression.

    I feel like my math is wrong somewhere. I'll need to sit on this some more.
    Seems pretty high to me especially when you have two forks.

    Is the 273mm and 240mm the amount of compression available for the spring? If so see the math below.

    .95 kg/mm * 273 mm = 259.35 kg * 2.2 lb/kg = 570.57 lbs for one fork leg x 2 = 1141 lbs total

    1.1 kg/mm * 240 mm = 264 kg * 2.2 lb/kg = 580.8 lbs for one fork leg x 2 = 1162 lbs total

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