F800GS Bitubo Fork Kit

Discussion in 'Parallel Universe' started by DockingPilot, Jun 1, 2009.

  1. The Griz

    The Griz Long timer

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    Yep, given you're within weight design spec of the bike, I'd say you're in for a pleasant surprise with these Bitubo springs that come with this kit! :D "The hydraulic unit is in a sealed and nitrogen pressurised cartridge, with oversize pistons and laminar packs studied for the perfect control of damping." <---I trust this to be true when you're within weight spec of 187lbs +\- a few.
    #41
  2. DockingPilot

    DockingPilot Hooked Up and Hard Over

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    INSTALLED AND TESTED........sorta.

    These are stupid easy to install fellas and the directions are spot on. The only blank you'll draw is tightening the cartdrige units to the sliders. They of course will spin. Use (lightly) an impact wrench. Done.

    You can see there is a great difference between the way the stock Zokes dampen and the gas charged Bitubos.
    [​IMG]
    Stock
    [​IMG]

    And here they are installed
    [​IMG]
    [​IMG]

    Honestly, you do not need a pictorial to install these. Its rediculously easy.
    Now the ride results. Let me 1st say I only had time for a half hour on the bike. I was able to ride dirt road and abandoned railbed as well as pavement. So my opinion is still in a holding pattern. And my opinion is just that, mine, and may be worth to you what you paid for it. :lol3 But I have ridden offroad all my life and owned many different bikes. Opps, almost forgot, Drew Smith measure the old and new springs for those guys wondering about spring rate.
    Stock rate 4.8 :eek1
    Bitubo rate 6.0 :eek1
    Yea, that seems strong, but Drew has reworked some big 1200 GS bikes and they have been sprung with 7 something-8.0 springs. So I kept an open mind before going out on it.
    In a nutshell: Huge, significant difference. Do you guys know when your riding and you see a pothole in the pavement ot a rock embedded in the soil and you know your going to hit it in a second and you sorta brace for the feeling you'll get from the stock forks ? Or sometimes under your helmet you go "ah" when you hit it ? Thats gone.
    I rode over heaved pavement sections, and hunted potholes. I was amazed that I no longer felt them at all. On the dirt roads, the embeded rocks were sucked up with no steering upset. I went down a local abandoned railbed that has a small layer of RR gravel sitting on top of hardpan. At 40-50mph, if I closed my eyes, you could have told me I was on pavement and I wouldnt have the difference. Also, no more huge brake dive. Just normal like it should be.
    Again, this is prelimanary. I still need to ride her for a week to see how well I like them. But, so far they are 80% better than stock. And for the price, and the fact you can install them in your own garage without sending your forks away, they just may be the cats ass.
    :thumb
    #42
  3. PackMule

    PackMule love what you do Super Moderator

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    :lurk
    #43
  4. jeffchri

    jeffchri Been here awhile

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    DockingPilot - do you have stock rear shocks? And do you ride it with high preload?

    Where did you set the preload on the Bitubos?
    #44
  5. DockingPilot

    DockingPilot Hooked Up and Hard Over

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    I havent tried even setting them yet as my Hyper Pro shock is here but not installed yet. The, Ill set the sag.
    #45
  6. The Griz

    The Griz Long timer

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    Good to hear you like 'em, man! :thumb
    #46
  7. bxr140

    bxr140 Flame Bait

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    Mostly because I've been too lazy to take my forks apart, do the crimps on the damper tube prevent you from removing the damping rod?
    #47
  8. johngil

    johngil Reseda, CA

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    Yes, and that's part of the problem.
    #48
  9. DolphinJohn

    DolphinJohn Caveman

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    So those of us without a compressor/impact wrench won't be able to install ourselves?
    #49
  10. DockingPilot

    DockingPilot Hooked Up and Hard Over

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    bxr,
    Yes, thats where the female threads are housed. Crimped to hold it in there I guess.
    #50
  11. DockingPilot

    DockingPilot Hooked Up and Hard Over

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    Yea John, but, you can get an electric one from Harbour Frieght for next to nothing. So dont let that stop you. If you bring it to a suspension shop to install, they will do the same thing. Using an impact wrench to loosen and tighten flywheels is also a common practice, because unless you have the special tool, there is no way to stop the shaft from spining.
    Again, this is a very easy, quick swap out. Remember to loosen the original fork caps before you loosen the tripples, it will act like a vise for you. Taking the forks off and on the bike was very easy. Remove front wheel, take off calipers, remover front fender, loosen caps, loosen tripples, slide forks out. Instuctions were short and easy to follow.
    #51
  12. DockingPilot

    DockingPilot Hooked Up and Hard Over

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    And for you fellas looking for your spring rates, here's the email I just recieved from Bitubo:

    Dear Mr Reinbold,

    Thank you very much for your e-mail.
    Our fork cartridge kit is studied for a “standard” weight between 65Kg and 85 Kg. If your weight does not belong to this standard, you can mention in your order the exact weight and our technicians will study the most proper solution for you.
    By the way, where are you writing from? I could give you the address of our importer in your country for getting more details and get your order.
    Please let me know,


    Export Dept.
    Elena Valentini

    C.d.a. Bitubo snc
    Via A. Volta, 24
    35037 Z. I. Teolo (PD)

    Tel.: +39 049 9903475 int. 203 or 1
    Fax.: +39 049 9903447
    E-mail: elena.v@bitubo.com
    Web: http://www.bitubo.com


    So mine fall into my weight catogory. I'm 168 nude. And I ride nude a lot. :lol3
    #52
  13. DockingPilot

    DockingPilot Hooked Up and Hard Over

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    Here is the phone # of the US dealer. Super nice guy and BMW dealership owner.
    610-562-3155
    For under $550, you cant beat it.
    #53
  14. DolphinJohn

    DolphinJohn Caveman

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    Thanks Frank.
    #54
  15. GB

    GB . Administrator

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    Hey thanks for the feedback and pics! That's the trouble with this site.. I see, and I want! :(:

    The installation sounds simple enough, but a step by step pictorial would have been a tremendous help for some of us with a challenged imagination, like where exactly does the impact wrench come into play and how.

    If you remove them and reinstall, please keep us in mind. :thumb
    #55
  16. DockingPilot

    DockingPilot Hooked Up and Hard Over

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    Trust me, you will not be wondering "what do I do next". In any event, if anyone does just pm me.
    Herre's the part your asking about GB.
    The new gas charged cartdridge, you slip itno the fork tubes and it sits on the bottom of the tube. Well there is a hole down there, because you already removed the hex head bolt to remove the old one. Now you put the bolt back in to hold the new one in place. But when you tighten the bolt the new cartdridge will want to spin with the bolt and you cant hold it to stop it because it's inside your fork tube and your hands wont fit in there. So what you di is use an impact wrench. They spin bolts so fast the cartdridge cant keep up and it will tighten nicely. This is a comon way of tightening things like this, such as flywheels.
    Dont be worried about doing this guys, I promise its super easy and if I can do it, so can your daughter. :lol3
    #56
  17. GB

    GB . Administrator

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    Thanks for 'splainin'.. I do have a compressor and impact wrench! :thumb Any specific torque setting for that bolt?
    #57
  18. DockingPilot

    DockingPilot Hooked Up and Hard Over

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    It wont take much torque to tighten them. Look under your forks now and you will see the hex head bolt I am referring to. That is what holds the present and new cartdriges in place. The cartdridge is shorter than the fork tube, so it's impossible to hold it will you tighten the bolt back up. An impact wrench will do the trick. First finger tighten the bolt though of course. No locktite !
    #58
  19. PackMule

    PackMule love what you do Super Moderator

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    Damper unit to slider tube

    M10 x 25 - 10.9

    with sealing ring
    50 Nm



    :beer
    #59
  20. DockingPilot

    DockingPilot Hooked Up and Hard Over

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    Yes, but your not going to know using an impact gun, so dont worry. It simply holds the cartdridge in place and the washer prevents oil seepage. Its not criticle. Again, even if you bring your forks to a shop, they will do the excact same thing.
    #60