F800GS Holan Crashbars report

Discussion in 'Parallel Universe' started by The Griz, Feb 18, 2009.

  1. WoodWorks

    WoodWorks House Ape

    Joined:
    Feb 11, 2003
    Oddometer:
    2,204
    Location:
    Ashland, OR, USA
    They're bolted on the same way as the Adventure Spec, SW Motech, Hepko Becker, and Givi bars. Any others that I've missed?

    David
    #61
  2. F800 Rob

    F800 Rob MotoInsight

    Joined:
    Oct 3, 2005
    Oddometer:
    1,053
    Location:
    Pittsburgh, PA
    Metal Mule. :lol3

    Seriously - every single set of crashbars on the market bolt there with the exception of the Wunderlich setup.
    #62
  3. C5!

    C5! Been here awhile

    Joined:
    Sep 23, 2007
    Oddometer:
    278
    Location:
    Venezuela & Colombia
    and the Touratech
    #63
  4. MCMXCIVRS

    MCMXCIVRS Long timer

    Joined:
    Nov 13, 2006
    Oddometer:
    1,325
    Location:
    Calgary, Alberta, Canada
    Even the BMW bars mount to the engine. I suspect that is exactly what those mounting points were made for.
    #64
  5. The Griz

    The Griz Long timer

    Joined:
    Nov 26, 2008
    Oddometer:
    3,851
    Location:
    Minnesota
    +1 Yup.:thumb
    #65
  6. glitch_oz

    glitch_oz ...

    Joined:
    Apr 23, 2006
    Oddometer:
    2,155
    Location:
    AUS
    Wouldn't be the first time that BM has fugged up.
    After all, it's to THEIR benefit when finishing up with cracked engine cases after a more serious hit.

    Seems that only Wunderlich and Touratech got it right then.

    I'm not an engineer, but a "flexible" (steel) long-leverage impact-item bolted to a more rigid /brittle Alum item spells trouble.... doesn't really need Einstein-quals, does it?

    Time will tell, I guess...

    (nb Not trying to stir the shit here, just thinking aloud...and from experience)
    #66
  7. The Griz

    The Griz Long timer

    Joined:
    Nov 26, 2008
    Oddometer:
    3,851
    Location:
    Minnesota
    Your profile doesn't say you even own an F800GS, so I'm going to roll with that assumption. Are you qualified to make these statements?

    When speaking of the Holan, BMW, Adv Spec, etc.: the brunt of the force from a hit would direct most of the force to the frame. The main connection point for these crash bars is on the sides of the bike, by the top of the engine. This connection is directly to frame, and designed by BMW and other to take the brunt of the impact. Not much would happen to the small connecting point at the bottom of the engine. And actually, the Holans are designed to relieve stress at these connection points as well.
    #67
  8. F800 Rob

    F800 Rob MotoInsight

    Joined:
    Oct 3, 2005
    Oddometer:
    1,053
    Location:
    Pittsburgh, PA
    You are completely off base here. Crash bars are not designed to an immovable object that smashes everything around it during a crash. They're designed to 1) provide a certain level of rigidness in case of minor impacts 2) bend at predesigned points of inflection during a more severe impact, and 3) snap at the mounting points instead of damaging what they attach to. We're not talking titanium mounting hardware here...

    In any case, you're incorrect about Touratech - they attach to the same mounting points, and I'm putting my trust in them (and their OEM Holan) over someone on an internet forum.

    Nothing personal, just sayin...
    #68
  9. DiabloBlanco

    DiabloBlanco Intl' Hops Inspector

    Joined:
    Jun 2, 2007
    Oddometer:
    303
    Location:
    Minneapolis, MN
    Correct me if I'm wrong (I'm sure you'd know this F800Rob) but isn't Touratech the ones who make the crash bars for BMW?. So that kinda negates the Touratech is holier than thou (while charging an arm and a leg).
    #69
  10. glitch_oz

    glitch_oz ...

    Joined:
    Apr 23, 2006
    Oddometer:
    2,155
    Location:
    AUS
    Doesn't make a diff, does it?
    Physics are physics, impact forces are impact forces...regardless of brand/ model.
    Qualified?
    If common sense and 35 years of wrenching and riding (incl. building a few bikes over the last few years) counts....



    ??
    If a hit is directed upwards and looking at the twin-brace of the bars running vertically up the side, those 2 little 5mm Allen bolts at the bottom will either rip out of their their threads or just snap, the curved mounting plate hitting the engine cover (which is usually very thin cast).

    The more likely scenario is a drop while riding... directing impact forces upwards/ rearwards....and as the upper mounting location is more solid than the bottom, that upper bolt will act as a pivot... again tearing the bottom plate off the casings (as the down-leg is nicely braced and therefore fairly solid = transmit forces).
    God forbid if those down-struts get snagged on a solid branch or the edge of a rock (creating rotational forced on the bottom bracket).

    It's the same problem as on the DL650, which just hasn't got any decent mounting points to mount a bash plate...some aftermarket supplier decided to make a "super-tough" bashplate from 5mm alloy, all braced up and beautifully finished....with a top-mount on the front cyl head.:huh

    Great piece of work that thing .....for an ashtray.
    #70
  11. The Griz

    The Griz Long timer

    Joined:
    Nov 26, 2008
    Oddometer:
    3,851
    Location:
    Minnesota
    Yes it does make a difference. Every bike is designed differently.

    Not qualified on the F800GS.

    The likely hit would be from the side, not up from the bottom. Hence transmitting the force to the upper frame fastening points. Not the bottom of the engine. For some one so "qualified" on the F800Gs surely you can understand that.

    And, whatever dude. You don't know what you're talking about. BMW wouldn't have designed it like that if it would have been a problem. You're purely speculating.
    #71
  12. glitch_oz

    glitch_oz ...

    Joined:
    Apr 23, 2006
    Oddometer:
    2,155
    Location:
    AUS
    2)Predesigned points?
    Doesn't that all come down to direction of impact, force-vectors and an endless number of other possibles?

    3) Snap at mounting points?
    That's one thing I still have to see.
    Seen dozens bent and buckled, totally out of shape and folded back onto themselves with all sorts of colateral damage...but I've never seen a crashbar break at the mounting points/ plates.
    No OEM bar, Givi, Hepco or whatever...
    The odd broken broken weld caused by vibration, sure...but never snapped at "pre-designed" points.


    Just because someone does something in a certain way doesn't mean that it should be accepted as beyond doubt.
    Plenty of evidence around of the "Big Guns" in the industry (any industry, really) goofing up.


    Same here.
    #72
  13. glitch_oz

    glitch_oz ...

    Joined:
    Apr 23, 2006
    Oddometer:
    2,155
    Location:
    AUS


    Sorry for sprouting shit then...I'm deeply humbled
    Of course the F8 isn't even a bike...and almighty BM is way beyond Godliness :lol3 :lol3
    #73
  14. Bayner

    Bayner Long timer

    Joined:
    Mar 27, 2008
    Oddometer:
    1,738
    Location:
    Penticton, BC
    Just for reference and off topic I understand, But I went with the TT bars and they do not mount to any points on the engine. They use the footpegs and the same central frame mount everyone else does. Sorry, I don't have pics at present.
    #74
  15. The Griz

    The Griz Long timer

    Joined:
    Nov 26, 2008
    Oddometer:
    3,851
    Location:
    Minnesota
    I couldn't have said it better myself!!:thumb
    #75
  16. johngil

    johngil Reseda, CA

    Joined:
    Jun 28, 2007
    Oddometer:
    3,814
    I tipped over. Nothing bad happened, and my motor didn't fall out or break in two.
    #76
  17. F800 Rob

    F800 Rob MotoInsight

    Joined:
    Oct 3, 2005
    Oddometer:
    1,053
    Location:
    Pittsburgh, PA
    :lol3

    I think we're back on topic now.
    #77
  18. F800 Rob

    F800 Rob MotoInsight

    Joined:
    Oct 3, 2005
    Oddometer:
    1,053
    Location:
    Pittsburgh, PA
    Touratech doesn't make them to my knowledge. The only thing that I know Touratech makes for BMW are the Adventure Panniers. That said, in this world now, who knows who makes what. I didn't know that Touratech outsourced manufacturing (to Holan for some parts) until mid-way through last year.

    If I didn't work at a BMW dealer for the better part of a decade, and didn't see the import stickers from the EU, I'd say that everything is made in China by six year olds.

    :deal
    #78
  19. MCMXCIVRS

    MCMXCIVRS Long timer

    Joined:
    Nov 13, 2006
    Oddometer:
    1,325
    Location:
    Calgary, Alberta, Canada
    I had a look at my wifes F800ST this afternoon and it does not have the mounting bosses on the engine at all. That means they were specifically put there on the GS for a reason. One would hope that they made them strong enough to withstand the forces of a fall. An all out crash might be different, but then there would also likely be significant damage elsewhere on the bike.
    #79
  20. The Griz

    The Griz Long timer

    Joined:
    Nov 26, 2008
    Oddometer:
    3,851
    Location:
    Minnesota
    +1:thumb Exactly.
    #80