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Bolt-on Subframes For BMW Airhead (R100RS -77)

Discussion in 'Airheads' started by rockstoner, Oct 8, 2018.

  1. rockstoner

    rockstoner Adventurer

    Joined:
    Dec 22, 2015
    Oddometer:
    78
    Location:
    Sweden
    Hello Knowledge!

    I have just bought a BMW R 100RS from 1977, to rebuild this winter.

    These three bikes are my biggest inspirations

    https://www.caferacerdreams.es/en/moto/crd49-cafe-racer-bmw-r100rs/
    https://www.caferacerdreams.es/en/moto/crd38-cafe-racer-bmw-r90/
    https://www.caferacerdreams.es/en/moto/crd65-cafe-racer-bmw-r100/

    The only problem is the Weld-on subframe made by CRD (i aint no welders son).

    Fortunately i have found some really nice bolt-on subframes
    https://www.kickstartershop.de/en/s...ss-bhckrt-f-bmw-2-valve-models-duolever-black

    https://www.vonzeti.com/product/t19-bmw-subframe/

    http://bespokemotorcycles.co.uk/product/dark-skirt-erebos

    The one from kickstartershop is definitely the most similar to my inspirational bikes, (and very expensive..)



    Question:
    SO, Have i missed any manufacturers for Bolt-on subframes that fit my bike ?

    I am also searching for manufacturers for rear mudguard (that hugs the wheel)

    Is there any rear pegs that can be mounted to any original frame mount ?
    #1
  2. ME 109

    ME 109 Long timer

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    I'd stand and watch my RS go up in flames before I'd sell it and let that happen.
    But that's just me.
    #2
    UnclePete, BoxerD, dirtsurfer and 6 others like this.
  3. Warin

    Warin Retired

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    Once you have sold it ... it is theirs to do with what they want.
    #3
    JRM1290 likes this.
  4. ME 109

    ME 109 Long timer

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    They wouldn't get it, is what I'm saying. 20070805-humanLemmings.jpg
    #4
  5. rockstoner

    rockstoner Adventurer

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    I would like if we could stick to topic, im not interested in personal opinions.
    #5
    nothing likes this.
  6. beemerphile

    beemerphile Long timer

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    Thou mayest be lost my good friend.

    #6
  7. Jim Day

    Jim Day full manic mechanic

    Joined:
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    This is not Wikipedia, we are individuals, so you are asking for opinions, and the most prevalent opinion your likely to get is 1977 R100RS is a collectable that should be kept original if possible.

    Just curious but what is the serial number? The original 318 were made in 1976, but sold as 1977 but all the original 77s are considered collectable, and there is a registry that keeps track of them.

    http://ibmwr.org/rs77/rs77list.htm

    I currently own four BMWs, three are modified (I'm a welder), but I'd never mod my 76 built R100RS. Stock it's probably worth more then my other three combined.

    You might be able to sell that RS as is and get enough not only to buy another R100, but finance your build as well.:beer
    #7
  8. brfoster

    brfoster Baile Atha Cliath

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    Jim, a minor correction - there were 578 US-spec R100RS made in 1976. There were also 1458 Euro-spec R100RS made in 1976. :beer
    #8
  9. Jim Day

    Jim Day full manic mechanic

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    You sure about that I thought the last one made in 76 was 6180317.
    #9
  10. Jim Day

    Jim Day full manic mechanic

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    You are right. I just looked it up. It was 317 in November it jumped to 578 in December. That's what I get from posting from memory. I think I read that the last big pipe bikes were made in November, so I was probably thinking big pipe. Long night working in the shop, The 318 was typo I meant to say 317, which is still wrong. Looks like I messed up the link as well:lol3
    #10
    brfoster likes this.
  11. brfoster

    brfoster Baile Atha Cliath

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    Jim, table below shows Euro-spec bikes (608xxxx) and US-spec bikes (618xxxx).


    " Date "Start "End "Start "End
    " 03/76 6080001 6080003 N/A N/A
    " 05/76 6080004 6080013 6180001 6180004
    " 08/76 6080014 6080177 6180005 6180059
    " 09/76 6080178 6080404 6180060 6180113
    " 10/76 6080405 6080712 6180114 6180205
    " 11/76 6080713 6081175 6180206 6180317
    " 12/76 6081176 6081458 6180318 6180578
    #11
  12. brfoster

    brfoster Baile Atha Cliath

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    Too quick for me Jim! :beer
    #12
    Jim Day likes this.
  13. Jim Day

    Jim Day full manic mechanic

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    No problem. You were right anyway. :D
    So I got to wonder what he's got. If it's fully there and in good shape maybe he'd sell it to someone.
    Those bikes get a little rarer every day. :beer
    #13
  14. brfoster

    brfoster Baile Atha Cliath

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    You're right, they are getting rarer by the day! Another one bites the dust!
    #14
    Jim Day likes this.
  15. El Matador

    El Matador Adventurer

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    My 77 RS (#527) was built in 12/76 and has the 40mm pipes. As collectible as the 77 models are supposed to be, I have been trying to sell mine for quite a while now, with no real interest. It’s been on the flea market here for close to a month, with no inquiries.
    #15
  16. Cletus Runswithscissorsguy

    Cletus Runswithscissorsguy hiding in plain sight

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    You posted here and you asked for advise on where to buy subframes.
    If you don't want opinions, don't post.
    What you have to understand is that this forum is very divided on the cafe racer "build".
    You also have to understand what you've got there. A first year R100RS. If it were a newer RS you'd get less funny looks.
    But the first year is arguably the most coveted one.
    Do what you will, if you screw up another '77, it just makes mine more collectable. But as @Jim Day sez
    "You might be able to sell that RS as is and get enough not only to buy another R100, but finance your build as well."..

    Do us a favor and post pics of the bike. If it's wrecked or torn up you'll get more help that you might wish for.

    But don't ask for advice and get all pissy when we'd like to see another '77 restored, not cafe'd. :-)
    #16
  17. rockstoner

    rockstoner Adventurer

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    6082546
    #17
  18. rockstoner

    rockstoner Adventurer

    Joined:
    Dec 22, 2015
    Oddometer:
    78
    Location:
    Sweden
    I like beer btw, i think it tastes good.
    #18
  19. ME 109

    ME 109 Long timer

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    I like beer too, so I'll point out that your RS will/can carry a lot more beer than a cafe will. On ice too. As well as steak, cheese, dips etc etc. Great for camping out in the bush.
    #19
    Geezerrv likes this.
  20. Jim K in PA

    Jim K in PA Long timer

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    Built March 1977 - Euro RS - it's real.

    Pics? Miles? Condition?

    The examples you linked to look cool, but can be built from just about any airhead. That's why chopping/cutting some specific models, like R90S, early RS, specifically, is met with resistance from those that know and love these bikes.

    That said, if you make changes that are reversible, and keep the original parts for selling on with the bike to someone in the future that may wish to restore it, that is probably a reasonable alternative path.

    Seriously though, like Jim Day said, depending on what you paid for it, you can probably sell it on to one of us nutty "purists" for enough coin to buy a 90/6 or 80/7 and have at it, with funds to spare for the custom bits.

    And good custom bits will cost money if you have to buy rather than build them. They should if done right. Nothing is as sad to look at as a cafe/bobber done on the cheap. The examples you link to probably have more $$ in them than you think.
    #20
    FR700 likes this.