Mounted a F650 windshield to my 640 Adventure tonight

Discussion in 'Thumpers' started by PASSMORE, Jun 8, 2004.

  1. PASSMORE

    PASSMORE Just the last name...

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    Hi all,

    Finished my installation of the BMW F650 windshield on my KTM 640 Adv tonight. I will post photos as soon as I can get them posted. I mounted it "midway" for both functionality and aesthetics that are pleasing to my eye. I made no modifications to the shield for mounting such as trimming or bending. I may trim just a hair here and there. The bottom edge is against the fairing - this may not be favorable, but I will monitor it. Also, I get ever so little of a tap on my right hand guard at full turn (my bars are a touch tweaked on that side). Everything points to a reasonable modification in both price and installation.

    Michael
    #1
  2. d0gWateR

    d0gWateR Goat Stuntaz DSMC

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    MiFoPa,

    would like to see the pix, considering the same mod for longer runs.

    Cheers!
    #2
  3. PASSMORE

    PASSMORE Just the last name...

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    Here are some photos... In hindsight I think I would have mounted it a hair higher, but overall I am very pleased with the performance.

    Attached Files:

    #3
  4. PASSMORE

    PASSMORE Just the last name...

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    I used hex head bolts for a cleaner look - I believe they were 3/8's. For spacing I used skateboard "truks" bushings (Bones - medium density).

    Attached Files:

    #4
  5. Mack

    Mack Gone, but never forgotten. RIP, Mack...

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    Might have to get me one of those. :thumb
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  6. Mack

    Mack Gone, but never forgotten. RIP, Mack...

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    Looks warm and comfy.
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  7. Velocibiker

    Velocibiker Adventure Antagonist

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    Almost looks like it belongs there :D .

    I'm 6'5", so the OEM screen is practically useless. I'm mostly concerned with helmet buffeting. Usually results when a taller screen is attached that isn't designed to provide a full sized air pocket.

    With the OEM screen, dirty air is hitting me at about an inch or so below my collar bones.

    What's been your experience so far?
    #7
  8. twsiv

    twsiv Been here awhile

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    so do you have a report for us yet? is there buffeting.
    I'd like to do that myself, although one more thing to not clean. :-)
    #8
  9. meat popsicle

    meat popsicle Ignostic

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  10. rapiti

    rapiti IOR Veteran

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    It sounds like you have a pretty good setup right now. A taller windscreen would move that turbulence upwards. I don't think we can get a tall enough windscreen to get behind, or at least I wouldn't want one that tall on my D/S bike.

    I have the older, taller KTM Adventure windscreen, and at 6'3 and not so long waisted, I get buffeting. I am actually thinking about splashing a mold off my mask and trying a cut-down version, unless I find a mask off a wrecked '01-'03 to try.

    You F-650 windscreen guys might want to try aluminum chainring bolts from a bike shop. Ricardo Kuhn recommended these a long time ago. :thumb Maybe a fat o-ring in between.
    #10
  11. Cat0020

    Cat0020 El cheapo

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    The buffering effect is mostly caused by the vaccum effect behind the windscreen. I eliminated that effect by putting some 4.5-5.0 cm of space between the Dakar windscreen and the LC4 Adv windscreen.
    It might not looks the best, but it works to eliminate the vaccum effect at high speed.
    By adjusting the "tilt" of the F650GS Dakar windscreen with different length washers, you can easily find a windscreen position where you might be able to get rid of your buffering problem.. you might just need to drill bigger holes on your Adv windscreen to allow flexibility for mounting points.
    Make sure you have plenty of supporting members for the mounting points of the GS Dakar windscreen, it will flex your Adv windcreeen at high speed.

    Here's the original thread from over a year ago when I first put the GS Dakar windscreen on my LC4 Adv
    :
    http://www.advrider.com/forums/showthread.php?t=12728
    #11
  12. Velocibiker

    Velocibiker Adventure Antagonist

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    Yup. That's why sport bike screens always have a vent cut out at the base. Ya might tinker with different sized spacers to change the angle of the screen too. That can also make a huge difference.
    #12