BMW 450 enduro (merged) threadfest...

Discussion in 'Thumpers' started by Max Kool, Mar 4, 2007.

  1. The Shred

    The Shred Airventurer

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    Apr 29, 2010
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    425
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    NY82: ALB 156 @ 13
  2. ScienceOfDirt

    ScienceOfDirt U-Boat Rider

    Joined:
    May 10, 2010
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    1,774
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    Snowbelt/Rustbelt of Northeast Ohio
    Anyone got a Speedbrain or Touratech seat they want to part with, or loan so I can copy the seat pan?
  3. mr man

    mr man Adventurer

    Joined:
    Jun 10, 2010
    Oddometer:
    12
    Wow
    30 minutes later and such a nice set pictures that show all the electrical connection including the power plug
    Thanks
  4. Muecke

    Muecke Been here awhile

    Joined:
    Jan 18, 2010
    Oddometer:
    106
    Location:
    Germany
    Speedbrain does not have it anymore and I wrote an email directly to Blackbird. But Blackbird answered me, that they will not produce it for the moment. I told them that a lot want this seat, but ,,,

    Maybe everyone who wants such a seat should write an email to blackbird:
    http://www.blackbirdracing.com/contact.html?do=NS1Fbi0tLS0tLS0tNg==

    Maybe this can help. :)
  5. bmwbeej

    bmwbeej Chuck Norris

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    Oct 7, 2011
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    20
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    Australia
    Yep email sent to Blackbird!
  6. ScienceOfDirt

    ScienceOfDirt U-Boat Rider

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    Snowbelt/Rustbelt of Northeast Ohio
    Sent an email. Thanks for the contact info.
  7. FreeTheBeast

    FreeTheBeast Shunpiker

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    Jan 23, 2004
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    3,077
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    Particularly for Sandblast Rally, I've changed my extra fuel carrying configuration. I've bolted on a Roto-pax 1 gallon fuel container.

    [​IMG]

    In the past I have used MSR fuel bottles in a canvas bag secured to the rear fender. I think the Roto-pax is a better alternative. It's more secure and carries more gas.



    Old setup at Sandblast 2012:

    [​IMG]
  8. DoctorIt

    DoctorIt vrooom!

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    5,681
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    Springfield, MA
    That does look like a great option - now show us how/what you bolted it to; snap a photo with the pax detached. :deal
  9. DoctorIt

    DoctorIt vrooom!

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    Unfortunately, for us, I think "a lot" is what, maybe 20 people? Seems like even the majority of the guys here on this forum have put their G's up for sale on the Flea Market in the last year.
  10. Emmbeedee

    Emmbeedee Procrastinators

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    Near Ottawa, ON, Canada
  11. Denny Mann

    Denny Mann Been here awhile

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    May 18, 2011
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    452
    Location:
    South Central Pennsylvania
  12. NoVa Rider

    NoVa Rider Long timer

    Joined:
    Nov 6, 2006
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    3,386
    Will the subframe handle the weight? :ear
  13. FreeTheBeast

    FreeTheBeast Shunpiker

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    Jan 23, 2004
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    3,077
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    +1.603
    I used the round base to provide better support. The instructions say that the upright base can be secured by itself. I thought using 4 bolts to secure the base would be twice as strong as two. :1drink


    Top:

    [​IMG]


    Under:

    [​IMG]
  14. OZbeemer

    OZbeemer Been here awhile

    Joined:
    Aug 30, 2008
    Oddometer:
    437
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    OZaukee county Wisconsin
    So at what point or points is the subframe prone to cracks with added weight like a giant loop or fuel containers?

    I've been talking to a frame shop about having a structural subframe made to eliminate the concern. He was asking about where the failures have been.

    Would anybody else be interested? PM if you would like to be kept in the loop about this. Its still early in the process, but should have a cost estimate in a couple of weeks.
  15. a1fa

    a1fa Throttle Jockey™

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    I got one... my friend fabricated brackets that sit on top of the subframe that bolt all the way through.. the tail is 100 times stronger now.. well worth it if you want luggage.
  16. tundra61

    tundra61 I wish I had a title

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    Nov 3, 2008
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    There
    I have the BB seat and I don't think it is really an upgrade from stock given how much you give up on the comfort side. I am not sure you are missing anything.
  17. Some Dude

    Some Dude what attitude problem???

    Joined:
    Dec 2, 2003
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    That's a sure way to a cracked subframe, I've gone through 3 different re-inforced subframes with a kolpin fuel can in the same location and gave up, fortunately I've got a 3.2 gallon midship tank now :D That rotopax will likely survive the rally but I wouldn't use it any other time or with any regularity. I only got 3-4 dual sport rides before the first failure, and less with subsequent re-engineering.

    Also I've seen the rotopax mount set-up shear the bolt right off,.......particularly on the ole mans F650GS Dakar 2 weeks ago in S America, wont ever see that gas can again, fortunately we didn't end up "needing" it
  18. Some Dude

    Some Dude what attitude problem???

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    Dec 2, 2003
    Oddometer:
    4,770
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    Might be able to loan you one as I have both a Speedbrain unmolested seat along with a Renazco altered speedbrain seat, however I use the virgin seat more and will definitely be needing it through the Sandblast rally in early March. There is also a stamped seat bracket that goes with the Speedbrain seat you'd have to re-manufacture, but that would be an easy hurdle in comparison.

    How exactly do you plan to copy the seat pan without removing the covering? There is also a very unique front tongue piece rivetted to the pan, a bit more complex then just a seat pan.
  19. OZbeemer

    OZbeemer Been here awhile

    Joined:
    Aug 30, 2008
    Oddometer:
    437
    Location:
    OZaukee county Wisconsin
    At what locations did the subframe fail??
  20. Some Dude

    Some Dude what attitude problem???

    Joined:
    Dec 2, 2003
    Oddometer:
    4,770
    Location:
    Woodstock, GA
    where the two square hollow tubes meet in triangulation and are welded to a cast tail stem. The first failure the horizontal tubing cracked where the stamped rear plate bolts the two subframes together. Subsequent failures after adding gussets to the tubing were to the cast tail pieces