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Thread: Let the R100 Deluge begin

  1. #1
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    Let the R100 Deluge begin

    OK, I did some searches to try not to ask too many newbie questions that have been done to death. These bikes are so long lasting that the variety out there on the road is dizzying. New to me 1980 R100. Rear brake sucks. Adjusted tight as I dare. Thought I would buy new shoes and disassemble. Anything obvious I should check first. I should say that the bike came from a small independent shop that does not seem familiar with airheads. They assured me it was "fully serviced and did not need a thing". I beg to differ. First thing (except for brake) was idle stuck high after riding and high with handle bars over to right. Pulled tank and re-routed cables. Better but still there. Lubricated cables (before I found Snowbum saying not to) which fixed high idle. Now I can not get any slack in casing on left. Both cable feel slightly slack with left adjuster all the way down. Able to get nice idle (with just a bit of de-acceleration burble) using Snowbum's shorting method. Will fix up manometer eventually and retune. Cleaned and adjusted points. Dwell 100. 4 times 8cyl setting correct? the right cable has a bit of slack. Is there an upper and lower when putting back into the hand grip? Lastly: for now. What recommendations do people have for parts without all the dealer gouge. Have a new Brown side stand coming from Max, but could not find brakes or bans for side covers on site. Thanks for the spelling correct on this site. Thanks in advance for the advice.
    Tim

  2. #2
    Douglas Williams
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    Airheads.org... it's a great support group and can help you sort out your airhead or get you together with shops that provide the service you need.
    Sent from a Galaxy, far, far away

  3. #3
    Douglas Williams
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    another thought. You're close to Tom Cutter of Rubberchickenracinggarage.com in Yardley, PA. It would be hard to find someone more knowledgable about airheads.
    Sent from a Galaxy, far, far away

  4. #4
    Registered User lmo1131's Avatar
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    Rear brake sucks. Adjusted tight as I dare.
    "tight as I dare" - what does this mean? Will the brake lock-up the rear wheel? If not, you may have a "glazed" drum - burnished from using oily brake shoes for example. MAXBMW has brakes shoes on their site.

    How many miles are on the odometer?

    +2 on Tom Cutter. Not being familiar with the marque, if you want to be sure what you have is "right", and more importantly be informed about what isn't, he'd be the guy to give it a once-over.
    "It is what you discover, after you know it all, that counts." _ John Wooden

    Lew Morris
    1973 R75/5 - original owner

  5. #5
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    max does sell the side cover bands, but on advise from this site I used some small bungee cord.
    Brian

    86 k100rt, 78 r80/7

  6. #6
    #4869 DennisDarrow's Avatar
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    Quote Originally Posted by lmo1131 View Post
    "tight as I dare" - what does this mean? Will the brake lock-up the rear wheel? If not, you may have a "glazed" drum - burnished from using oily brake shoes for example. MAXBMW has brakes shoes on their site.

    How many miles are on the odometer?

    +2 on Tom Cutter. Not being familiar with the marque, if you want to be sure what you have is "right", and more importantly be informed about what isn't, he'd be the guy to give it a once-over.
    +2K on all of this............Gotta bite my tongue on the advice side of this; but can't really recollect anything about setting timing and points with a dwell meter.......Most use just a standard old fashioned feeler gauge of the appropriate size, some use a light/ohm meter to set the timing statically, and others use a timing light...........Good luck.....get some help...........God bless........Dennis

  7. #7
    Macrunch MCrenshaw's Avatar
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    Pick up either a Haynes or Clymer manual. Or, buy both as there are some differences in each. Just spitballing here, but regarding your cables, there were two different types of handlebar sold on the R100S. The low or European style, and the higher US style. It is fairly common for the bars to have been changed out by a previous owner. Cables must also be changed if bars are changed. Could this be your issue?

    Regarding replacement part sourcing, there are various sites to check. The IBMWR and ADV sites have alternatives. Boxerworks and Airheads are both very good sites for information. Do your searches first though to avoid asking the repetitive and obvious questions. Lots of Youtube videos as well. Good luck!

  8. #8
    Administrator 20774's Avatar
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    Tim -

    Be sure and check the resources and links through the clickable link in my signature block.
    Kurt -- Forum Administrator ---> 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!

  9. #9
    Registered User
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    I believe your bike is covered in BMW's manual 01 51 9 798 461. Max has them.

  10. #10
    Registered User lkchris's Avatar
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    Your best resource hands down is your local BMW club. Maybe a local subgroup of Airhead owners.
    Kent Christensen
    21482
    '12 R1200RT, '02 R1100S, '84 R80G/S

  11. #11
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    Tom Cutter is the man. The rear brake should would reasonably well if there's nothing in there lubricating the surfaces. I would clean everything with rubbing alcohol and if that doesn't work, new shoes. The front brake on those is pretty good; I used to leave the rear brake on my '84 loose to avoid using it too hard in a corner.

    Any knowledgeable BMW dealer charges premium prices for parts. You pay for the knowledge that comes with the parts (same with mechanics as anyone can turn a wrench). Your closest dealers are Bob's in MD and Hermy's in Port Clinton, near Hawk Mountain. Both are pricey and excellent. Cutter is in Yardley, so that's your best option. I expect he's pricey too, but I've never taken any work to him. The advice he's given me has been invaluable (I know him through friends and because he's a control rider for the club I do track days with; I wouldn't expect anything from him on a cold call or email).

    And routing the throttle cables correctly is a problem unless you have a manual that specifies how to do it.
    61 Gold Star, 76 R90S, 03 CBR600RR, '13 690 Duke, '14 Street Triple R

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