'88 BMW R80 cafe

Discussion in 'Airheads' started by MIOB, Mar 4, 2009.

  1. Toaster.Tan

    Toaster.Tan Toaster Rider

    Joined:
    Feb 17, 2008
    Oddometer:
    195
    Location:
    The Great NorthWet
    Going up on-ramp at 9k in 4th had an indicated 106. Short gears. Typical Honda snik-snik-snik....:lol3

    Didn't want to bend a valve and take this apart again....:yikes
    :kboom

    Attached Files:

  2. SERE Nate

    SERE Nate Been here awhile

    Joined:
    Jan 31, 2013
    Oddometer:
    123
    I love this bike and would like to know where I can find a headlight like this one.
  3. MIOB

    MIOB Long timer

    Joined:
    Feb 27, 2009
    Oddometer:
    1,147
    Location:
    A cold, wet, flat place
    You should be able to find it at an Ural Club or dealer (it came form an Ural). It's yellow because I used a yellow bulb form some classic French car.
  4. Airhead Wrangler

    Airhead Wrangler Long timer

    Joined:
    Mar 4, 2008
    Oddometer:
    6,926
    Location:
    Back in Seattle, FINALLY
    My god, what a carb tuning nightmare. :eek1
  5. Uncle Pollo

    Uncle Pollo Bad Hombre

    Joined:
    Jun 1, 2006
    Oddometer:
    52,141
    Location:
    Albuquerque, Neue Messico
    My next bike ...
  6. MIOB

    MIOB Long timer

    Joined:
    Feb 27, 2009
    Oddometer:
    1,147
    Location:
    A cold, wet, flat place
    Time to dust off this topic since I've been dusting off the BMW recently.

    I installed a set of K100 forks (thanks for the online help inmates!), worked on the brakes and did some more minor stuff to get the bike safely back on the road.

    I've been spending many, many hours riding the BMW the last few days. It was a blast! :clap

    <iframe width="960" height="720" src="//www.youtube.com/embed/pRg7zqJ9qyk" frameborder="0" allowfullscreen></iframe>

    [​IMG]

    [​IMG]
  7. east high

    east high Been here awhile

    Joined:
    Oct 13, 2009
    Oddometer:
    955
    Location:
    Portland, Oregon
    What kind of road is that? It looks too narrow to be shared.
  8. MIOB

    MIOB Long timer

    Joined:
    Feb 27, 2009
    Oddometer:
    1,147
    Location:
    A cold, wet, flat place
    It's a road on top of a levee. They started building levees around 1100 A.D. Each time a levee broke, a deep hole was carved out by the rushing water. It was easier to build the new levee around that hole than through it. Hundreds (maybe thousends?) of break throughs resulted in twisting levees, great when you put a road on them :clap


    They are not main routes and they are wide enough to pass.
  9. russbryant

    russbryant Long timer

    Joined:
    Dec 12, 2003
    Oddometer:
    1,222
    Location:
    Tucson, AZ
    Still one of my favorite cafe BMW's but I really miss that Suzuki tank on it.

    Russ
    Tucson
  10. MIOB

    MIOB Long timer

    Joined:
    Feb 27, 2009
    Oddometer:
    1,147
    Location:
    A cold, wet, flat place
    Me too :sick

    I bought an aluminum tank, hoping it would look roughly the same. It didn't (and I have it for sale now). I am still hoping to pick up something similar to that blue tank.
  11. chollo9

    chollo9 Screwed the Pooch

    Joined:
    Jul 7, 2003
    Oddometer:
    1,628
    Location:
    Silk Hope, NC
    By the time you'd finished adjusting 24 shim & bucket valves, the carbs didn't seem so bad. But you did have to borrow the other mechanic's vac gauges, since we only had four!
  12. fifthsunset

    fifthsunset n00b

    Joined:
    Apr 8, 2014
    Oddometer:
    3
    Location:
    Central London

    Hi, newbie here. Mind if ask you a bit more about this? I've got an R80 RT and I want to make a new seat, but I've got no idea where to start! Did you make new seat stays from the tubing? Did you do the welding yourself? And how exactly did you put the seat together? Thank you!
  13. MIOB

    MIOB Long timer

    Joined:
    Feb 27, 2009
    Oddometer:
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    Location:
    A cold, wet, flat place
    I adapted the original subframe (made it shorter and narrowed it a bit). The 'speedhump' is the part I made from the trashed bicycle rack.

    I did all the welding myself (with a stickwelder at the time, I now have a TIG-welder). I had the cushion made by a guy who ussually does caravan interiors.


    I've been using the bike again lately (after 1-2 years of neglect). I went to work on the bke for the last couple of days. It really needs some attention. It's noisy (rattling) and it has some idle issues. See the post below.
  14. MIOB

    MIOB Long timer

    Joined:
    Feb 27, 2009
    Oddometer:
    1,147
    Location:
    A cold, wet, flat place
    Question:

    My BMW has some weird idling problems. Ussually it idles nicely around 1000/1100 RPM. But the faster the ride, the faster the idling get's.
    During a normal ride the Idle will gradually (at each stop/traffic light) rise to around 1700 rpm. When I'm in a racy mood the idle will rise as far as 2400 rpm.

    It seems to have something to do with the temperature. It's worse on warm days.


    The sparkplugs are the right color, the carbs are reasanobly sinced, it does not leak air on the intake and I've lubed the been can (the points are not sticking as far as I can tell).

    Anyone here who has a clue what to look for?
  15. oJOEYo

    oJOEYo Adventurer

    Joined:
    Apr 22, 2013
    Oddometer:
    35
    EDIT. I'm so stupid that I didn't even read the bean can part..

    Hey fellow Dutchman. This sounds like a sticky automatic timing. You should disconnect your battery and remove the front cover of the engine. There you will see what looks like a can. There's a small cap you can remove on the can to pour in some light machine oil. That will probably help for a while. If you want to do a more thorough job, remove the 'can' as a whole and open it up to clean it.

    You'll probably have to fix your bikes timing afterwards though..

    If you need some more help, just send me a PM an I'll see what I can do (and it's probably a bit easier for me to explain more technical stuff in Dutch than in English).
  16. MIOB

    MIOB Long timer

    Joined:
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    Location:
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    I am pretty sure the points are not sticky. Could it be anything else?
  17. oJOEYo

    oJOEYo Adventurer

    Joined:
    Apr 22, 2013
    Oddometer:
    35
    Yes. I just remembered that I battled the same issue not too long ago. (I'm sorry, I had a bike crash last week and my short-term memory is not as it used to be, yet).

    With my BMW it was a sum of multiple things. Check out the carbs. I though mine were synced, and adjusted well until I opened them. They were, but one of the carb needles missed all the slots for the needle clip.

    How long ago is it for you to replace your diaphragms? These tend to lose their strength rather quickly and can cause some pain too..

    I don't have any spare diaphragms, but I do have a spare carb needle. I don't know if you live 'close'-ish to Arnhem, but I'm planning to ride this weekend so if you need a needle I'd be glad to help.
  18. sammm

    sammm Adventurer

    Joined:
    Feb 24, 2012
    Oddometer:
    22
    Location:
    Auckland, New Zealand
    Maybe too obvious, but are your throttle cables coming unseated at the carburettor? Mine sometimes do that and get stuck slightly pulled.