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Thread: fork spring question

  1. #31
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    Kurt,
    I think you would be surprised how much you can improve your handling by setting the proper amount of sag.

  2. #32
    Administrator 20774's Avatar
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    photorider -

    Maybe, but as I said, I'm pretty comfortable with what I have. Seems like it would be difficult to really tell the differences because, as I see it, you ride a given setup, then come back home. You take a couple of hours to change the setup somehow...sag, oil weight, oil volume, etc....then back out. I don't think my physical memory would really be able to tell the difference. I have been noticing that I don't quite look over the fairing screen like I used to...I have to sit up higher. Hmmm...methinks. I wonder about the sag in the rear shocks. Konis installed long time ago on the softest setting. I'm beginning to think maybe I should try the next preload level...that makes even more sense as I pack for the trip to Salem.

    Granted changing the rear sag would be easy, but the front seems time consuming to a point where I woudn't remember the previous "setting" responses. I'm not an agressive rider by any means, but the bike seems to suit me.
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #33
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    "I'm pretty comfortable with what I have"

    Fair enough.

    If you ever want to experiment though, here is an easy way...

    1. Undo the bottom clamp of your fork boot
    2. Get a sharpie
    3. Sit on the bike
    4. Reach down and draw a line where the slider meets the tube (you might need a friend's help here with your fairing)
    5. Put bike on center stand and pull down on the fork tubes to make sure they are completely extended. Measure the difference from your line to the slider. That is you sag.

    Takes five minutes and at least you'll know where you stand.

    If you want to reduce the sag, just pop the tops of the fork tubes and insert a PVC spacer roughly the same size as the amount you want to reduce the sag by (yeah, I know this is not exact science but it will get you pretty close).

    Go for a ride.

    I'll bet you a beer you WILL be able to tell a difference!


    BTW,
    The sharpie trick works for the rear as well.

  4. #34
    not lost til out of gas 128521's Avatar
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    have you looked at the Race Tech website? I recently rebuilt my forks ( 1990 R 100 GSPD, 40 mm marzocchi forks ) with RT springs matched to my weight , and RT gold valve emulators . I have been thrilled with the results, I have mine set to the stiffer end of the range. there so many small adjustments to make, it makes your head hurt. the preload affects how stiff it rides, more preload, stiffer ride, oil weight also affects ride, the higher the weight the stiffer the ride. then if you get a gold valve there are 3 different springs each with 28 different recommended settings. I am running 17 mm preload, 10 wt oil, and GV with yellow spring ( the stiffest ) set to 2 turns, RT presets them to 4 turns, I will try that when I change oil.
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    don't know where I'm going, but I'm making good time. 1990 R 100 GSPD, 2005 R 1200 GS

  5. #35
    P Monk
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    Race Tech

    If the 74 was my main ride or money was no option I would be interested in these. As it is I have 3 times or more invested in the old bike than it is worth. I am looking for some improvement in ride without investing too much money (I know, cheapest thing on a motorcycle is me)

    But the Race Tech emulators are really impressive.
    P. Monk
    My prized possessions. 74 R90/6 Mine! (also know by bride as the Black Hole). 09 R1200 GS. My wife, 1953 model who has survived aplastic anemia and a bone marrow transplant. My most prized possession is my relationship with Jesus!

  6. #36
    not lost til out of gas 128521's Avatar
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    in that case start with preload, and oil weight, and maybe new springs, have fun!
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    don't know where I'm going, but I'm making good time. 1990 R 100 GSPD, 2005 R 1200 GS

  7. #37
    DaveM Dave Backmarker's Avatar
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    Agree only with progressive springs

    Quote Originally Posted by 20774 View Post
    Dave -

    I think this is where things get murky...you say inserting a spacer makes things stiffer. That might be the case for a progressive spring, ...
    Kurt,
    I absolutely agree. I wasn't clear. The spring rate changes with compression only with a progressive spring. Thanks for adding the clarification here.

    DaveM
    1975 R90S
    2000 R1100RT

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