HPMGuy/R-Dubb triple clamps Group buy - KTM forks on your Airhead!

Discussion in 'Vendors' started by Solo Lobo, Jun 9, 2011.

  1. Solo Lobo

    Solo Lobo airhead or nothing

    Joined:
    Mar 16, 2004
    Oddometer:
    9,223
    Location:
    Shoreline, WA
    THIS BUY THREAD IS NOW CLOSED (08/03/2011)!!!!


    But see the end of this thread and Guy may do further runs!

    Guy has used all the material he purchased for this run.

    **10/19/2011 Edit** Renner emailed HPMGuy to see about another run... check the end of this thread


    To help out Guy, I am putting this thread up.... I will not be fronting the $$ for other ADVR's who do want a set of these triples, and each will be accountable to settle with Guy on payment.

    Using plans created by R-Dubb, HPMGuy is machining triple clamp pairs that will allow you to put KTM forks onto your BMW Airhead.... the clamps do not come with a stem, and a KTM stem must be acquired and machined to work.

    This is the second run of these, and a few ADVR's have been running the first bach for a few years now, including Roadsacallin who took his around the world..

    The original group buy thread is HERE and provides details on the triple clamps... I am sure that HPMGuy will chime in here to answer questions as well as providing details.

    The original design thread is HERE

    Some information on the conversion, and picture of the member's bikes using HPMGuy's triples are located in my thread HERE

    Other threads with info are HERE and HERE and HERE and HERE and HERE

    the goods:

    [​IMG]
    #1
  2. Solo Lobo

    Solo Lobo airhead or nothing

    Joined:
    Mar 16, 2004
    Oddometer:
    9,223
    Location:
    Shoreline, WA
    THIS BUY THREAD IS NOW CLOSED!!!!

    Guy has used all the material he purchased for this run.

    List of those who are buyers, not those on the fence or just window shopping!
    BUYERS

    WP Extreme 50mm Conventionals

    1. Solo Lobo (50mm WP Extreme)
    2. ontic (50mm WP Extreme)
    3. TheBig Muff (50mm WP Extreme)
    4. gsjam (50mm WP Extreme)
    5. WalkingBear (WP Extreme)
    6. Garthe (WP Extreme)
    KTM 4860's
    1. Airhead Wrangler
    2. Borsiin (?)
    3. Country Doc
    4. Igmortis
    5. Mungo57 4860s with new stem
    6. GesII 4860s with new stem
    Machining of a KTM stem to suit (possible including the stem)
    1. Solo Lobo - I have a stem
    2. Airhead Wrangler - AW has a stem
    3. Igmortic - new stem
    4. Country Doc - new stem
    5. GSjam - new stem
    6. Big Muff - new stem
    #2
  3. Solo Lobo

    Solo Lobo airhead or nothing

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    Location:
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    More info:

    #3
  4. Airhead Wrangler

    Airhead Wrangler Adios Mexico

    Joined:
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    Oddometer:
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    Back in Seattle, FINALLY
    Alright, I'm in. (again) 4860 forks with stock KTM leg spacing, anodized black. I'd like to see a top view drawing of the rework for the 4860s beforehand if possible. Thanks.
    #4
  5. ontic

    ontic

    Joined:
    Jul 14, 2008
    Oddometer:
    1,078
    Location:
    Melbourne
    I'm in,

    3. Ontic (50mm WP Extreme forks) anodized black.

    Cheers,
    #5
  6. TheBigMuff

    TheBigMuff UNFKNBLVBL

    Joined:
    Oct 23, 2005
    Oddometer:
    57
    Location:
    Freshwater, Sydney
    4. Definitely in as well - WP 50mm extremes. Anodised black would be fine, but ideally would prefer clear.
    Cheers
    Lachlan
    #6
  7. HPMGuy

    HPMGuy Been here awhile

    Joined:
    Mar 17, 2006
    Oddometer:
    264
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    Mid-California
    No problem, as soon as there is enough interest in this style (and someone can supply me with the bore diameters) I will rework the design and post a copy here.
    #7
  8. gsjam

    gsjam Been here awhile

    Joined:
    Feb 14, 2009
    Oddometer:
    258
    Location:
    Perth, Western Australia
    5. Count me in (50 wp extreme ,anodized black for a g/s) :clap:D
    #8
  9. Airhead Wrangler

    Airhead Wrangler Adios Mexico

    Joined:
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    Back in Seattle, FINALLY
    I need to buy some KTM triples just to get a usable stem. What if I just buy a set off of ebay and have them sent to you so you can get the measurements you need? Also, if I do that would it be possible to have you turn the KTM stem down to fit BMW bearings and press it into the new bottom triple?
    #9
  10. HPMGuy

    HPMGuy Been here awhile

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    Location:
    Mid-California
    That would be fine. Doesn't look like there is much interest in anything but the 50mm right now though, I would need to get an order for at least 4 sets of the 4860 style to make a run. You might want to wait and see what happens.

    50mm guys are almost good to go on their own.....
    #10
  11. Solo Lobo

    Solo Lobo airhead or nothing

    Joined:
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    Here's one more old thread that gives the detail on the rake and trail for these triples (or so I believe)

    LINK

    Attached Files:

    #11
  12. Airhead Wrangler

    Airhead Wrangler Adios Mexico

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    Question about the 50mm forks - Can you even buy springs for these things anywhere? They'd need to be resprung, but the heaviest bike they were used on was the 640 adventure. Did anyone make any heavier springs for them?
    #12
  13. Solo Lobo

    Solo Lobo airhead or nothing

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    Jay.T's guy the rebuilt his WP 50mm's added custom wound springs. I'll PM him and ask who the guy is.

    Some more possibilities:

    A google search says that inmate ZeroDog supplied custom wound springs at one point (06/10)

    Lindeman advertises custom springs http://www.le-suspension.com/fork-services/

    Superplush (KTM Experts) advertise "many rates" for their springs... http://www.superplushsuspension.com/
    #13
  14. Solo Lobo

    Solo Lobo airhead or nothing

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    Here's a good lead!

    #14
  15. Airhead Wrangler

    Airhead Wrangler Adios Mexico

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    Hmmm. I was considering going the 50mm route and scrapping the 4860s, but not being able to buy off the shelf KTM springs easily and cheaply kinda sounds like a deal breaker to me. Plus I just gotta have that huge axle.:D
    #15
  16. Solo Lobo

    Solo Lobo airhead or nothing

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    Well, the parts fiche shows the stock KTM springs for a 2010 990 Adventure running $287.99 at retail, and the three places I saw building custom springs were both around $150.00.....
    #16
  17. walkingbear

    walkingbear Long timer

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    Location:
    Scottsdale AZ..
    I'm in for the WP 50 extremes
    #17
  18. herman maire

    herman maire Been here awhile

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    Oct 1, 2010
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    canada
    what is the dead line for this group buy?

    I still have some stuff to figure as I dont have a clue what model to go with or any of the pluses or minuses between the different models.
    #18
  19. borsiin

    borsiin Been here awhile

    Joined:
    Feb 7, 2008
    Oddometer:
    130
    If avaliable for the later model WP48mm USD forks i'm in.

    I have a 640 Adventure 2006 with WP48 and the dual disc setup. Way to powerful for the 640 but probably perfect for my GS....
    #19
  20. Airhead Wrangler

    Airhead Wrangler Adios Mexico

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    The 50mm will happen sooner than the 4860s. The design needs to be reworked a bit for the USDs.
    #20