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Thread: 1983 R100RS Rebuild Project Journal

  1. #1
    B Reams brook.reams's Avatar
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    1983 R100RS Rebuild Project Journal

    Folks,

    As I did on my last project, rebuilding a 1973 R75/5, I'm going to post updates on my new project, rebuilding a 1983 R100RS with 83,382 miles on it.

    I just posted the first installment on my blog site, Motorcycles and Other Musings,

    • 00 BMW R100RS Pre-Project Inspection

    and started the 1983 BMW R100RS Rebuild: Project Index" project index pagewhere you can go for all the links to my procedure write-ups for this project.

    Here are a couple pictures from the "home coming" journey.

    Hidden in the Back
    Hidden in the Back by Brook Reams, on Flickr

    Loading
    ABC Colorado Air Marshal, Dick Paschen Loading the New Project Up by Brook Reams, on Flickr

    Extras Included
    Extra Parts Included by Brook Reams, on Flickr

    Bike & Bags
    Bike & Bags at "Brook's Garage" by Brook Reams, on Flickr

    Speedmeter & Odometer-83,382 Miles
    Speedmeter & Odometer-83,382 Miles by Brook Reams, on Flickr
    Last edited by brook.reams; 04-03-2015 at 04:32 PM.
    Brook Reams - Arvada, CO
    Endeavor to Persevere
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS||2002 F650-GS||1983 R100RS||1977 R100RS||1975 R75/6||1973 R75/5

  2. #2
    Liaison 20774's Avatar
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    Oh, boy, sit back and prepare to be amazed!!
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #3
    B Reams brook.reams's Avatar
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    Quote Originally Posted by 20774 View Post
    Oh, boy, sit back and prepare to be amazed!!
    Kurt,

    This could be interpreted in several ways ;-) What's amazzing is the effort you put into moderating this list, helping me with questions and providing great support to the Airhead community. I greatly appreciate your efforts.

    Best.
    Brook.
    Brook Reams - Arvada, CO
    Endeavor to Persevere
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS||2002 F650-GS||1983 R100RS||1977 R100RS||1975 R75/6||1973 R75/5

  4. #4
    Liaison 20774's Avatar
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    Thanks for that...the moderator team tries to keep the "rubber side down" here so we can share our information and thoughts. But having such well documented refurbishments for others to refer to is priceless.

    From an Airhead standpoint, we could use more DIY posts (OK, how about some! ) that newbies could refer to when doing regular maintenance. So often I'm 80% done with an oil/filter change before I remember I could have documented it. Then I give myself a dope slap and leave an oil mark on my forehead. But really, more visuals would help all of us.

    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  5. #5
    Registered User Bob_M's Avatar
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    In 2005 I rebuilt my 82 RS. I look forward to watching this progress and to see what I might have done better. I still have the bike and LOVE it.

  6. #6
    rabid reader dbrick's Avatar
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    Jaguar

    Brook,

    The left-rear fender in this thread's first pic looks suspiciously like a 3.4 or 3.8 Jaguar sedan. I had an XK-150 once, the the bumper design is familiar.
    David Brick
    Santa Cruz CA
    2007 R1200R

  7. #7
    B Reams brook.reams's Avatar
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    Quote Originally Posted by dbrick View Post
    Brook,

    The left-rear fender in this thread's first pic looks suspiciously like a 3.4 or 3.8 Jaguar sedan. I had an XK-150 once, the the bumper design is familiar.
    Hi Dave,

    I think it was a jaguar sedan. The PO is a young mechanic and there were several projects strewn around the farm and in the garage.

    Sorry about the late reply, but I was in Europe and then Morocco riding the Atlas mountains on an F700-GS ... I know, sucky duty, but someone has to do it :-)

    Best.
    Brook.
    Brook Reams - Arvada, CO
    Endeavor to Persevere
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS||2002 F650-GS||1983 R100RS||1977 R100RS||1975 R75/6||1973 R75/5

  8. #8
    B Reams brook.reams's Avatar
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    1983 R100RS Rebuild Project Journal: Bing Type 94 Rebuild/Refinish

    You know, being retired just seems to leave no time to work in the shop. I end up doing all sorts of things and the next thing you know, time for bed. Anyway, I finally wrote up the Bing carburetor rebuild/refinish work I did on the 1983 R100RS project.

    When I rebuilt a 1973 BMW R75/5, I covered the procedure to rebuild the Bing type 64 carburetors, which are 32 mm, and the Karcoma petcocks. The R100RS has type 94 carburetors that are 40 mm and the Karcoma petcock outlet is 90 degrees from the inlet instead of directly underneath the inlet as for the R75/5. After 10 years, the designs are essentially the same, but there are some differences which I cover in the procedure write-up.

    Here is the link to the R100RS Bing type 94 rebuild/refinish procedures.


    I hope this material makes it straight forward for folks to rebuild these carburetors who may have been afraid to tackle a carburetor rebuild. Here are some before and after pictures of the carburetors.

    Before Rebuild/Refinish

    Before-Left Carburetor
    Before-R100RS Type 94 Left Carburetor


    Rusty Screws and Cap on Dome

    Engine Side of Carburetor
    Grunge and Fuel Stains

    Float Bowl Removed
    Float Bowl Removed, Missing Paint on Emblem

    After Rebuild/Refinish

    Engine Side of Restored / Rebuilt Carburetor
    Engine Side of Restored / Rebuilt Carburetor

    Top Side of Restored / Rebuilt Carburetor
    Top Side of Restored / Rebuilt Carburetor

    Outlet Side of of Restored / Rebuilt Carburetor
    Outlet Side of of Restored / Rebuilt Carburetor

    Carburetor Mounted - Clean
    After-R100RS Type 94 Rebuilt and Refinished Carburetor
    Last edited by brook.reams; 05-09-2015 at 02:59 AM.
    Brook Reams - Arvada, CO
    Endeavor to Persevere
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS||2002 F650-GS||1983 R100RS||1977 R100RS||1975 R75/6||1973 R75/5

  9. #9
    Registered User Rinty's Avatar
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    They're looking good, Brook. Thanks for the write up.
    Rinty

    "When you don't know where you're going, any road will get you there."

  10. #10
    B Reams brook.reams's Avatar
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    Quote Originally Posted by Rinty View Post
    They're looking good, Brook. Thanks for the write up.
    You're Welcome Rinty.

    Best.
    Brook.
    Brook Reams - Arvada, CO
    Endeavor to Persevere
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS||2002 F650-GS||1983 R100RS||1977 R100RS||1975 R75/6||1973 R75/5

  11. #11
    rabid reader dbrick's Avatar
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    Quote Originally Posted by brook.reams View Post
    Hi Dave,

    I think it was a jaguar sedan. The PO is a young mechanic and there were several projects strewn around the farm and in the garage.

    Sorry about the late reply, but I was in Europe and then Morocco riding the Atlas mountains on an F700-GS ... I know, sucky duty, but someone has to do it :-)

    Best.
    Brook.
    That's a first-class explanation...wish it had been me!
    David Brick
    Santa Cruz CA
    2007 R1200R

  12. #12
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    Rebuild project

    Quote Originally Posted by 20774 View Post
    Oh, boy, sit back and prepare to be amazed!!
    I look forward to following your progress. Right off, I have two related questions.

    1) What kind of windscreen is on the bike? It looks about half the size of the one on my R80RT. It looks like there would be correspondingly less wind resistance.

    2) Regarding the carburetor rebuild, I saw that Bing sells an instructional DVD along with its rebuild kits. Does anyone think it's any good / worth the money?

  13. #13
    Registered User dmftoy1's Avatar
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    Quote Originally Posted by tyro View Post
    I look forward to following your progress. Right off, I have two related questions.

    1) What kind of windscreen is on the bike? It looks about half the size of the one on my R80RT. It looks like there would be correspondingly less wind resistance.

    2) Regarding the carburetor rebuild, I saw that Bing sells an instructional DVD along with its rebuild kits. Does anyone think it's any good / worth the money?
    Bing DVD is excellent IMHO

  14. #14
    B Reams brook.reams's Avatar
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    Quote Originally Posted by tyro View Post
    I look forward to following your progress. Right off, I have two related questions.

    1) What kind of windscreen is on the bike? It looks about half the size of the one on my R80RT. It looks like there would be correspondingly less wind resistance.

    2) Regarding the carburetor rebuild, I saw that Bing sells an instructional DVD along with its rebuild kits. Does anyone think it's any good / worth the money?
    HI Tyro,

    It's the stock RS screen AFAIK. Of course, the RT upper faring is different from the RS as it's wider and so the screen will be larger than the one on the RS.

    Can't say anything about the Bing DVD. I did buy their manual that explains the operation of the constant velocity carburetors and also provides clues about how the jets interact across the RPM range to help with tuning.

    Hope that helps.

    Best.
    Brook.
    Brook Reams - Arvada, CO
    Endeavor to Persevere
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS||2002 F650-GS||1983 R100RS||1977 R100RS||1975 R75/6||1973 R75/5

  15. #15
    rsbeemer 22600's Avatar
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    This is better than the movies



    Thanks for sharing this Brook.
    1978 R100rs MOA#22600 125cc Kymco , 180cc Kymco Racing King
    The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.

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