Snowbum is also known as Robert (Bob) Fleischer, "The Expatiating Scribe of the Sierra")You are looking at the Technical Articles List page.
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It is NOT fully optimized for small screens, tablets, and smart phones.
This may result in some things not displayed without scanning side to side.
Hyperlink to an article on this website, a Winter Tale: CLICK!
1952, January....there is a road here someplace....
Technical information on this website is
But, if you want to help with website costs, click here: DONATING
That page also has history and also information on how I run this website, without my being obligated to anyone!
Animation by Mo Massen; furnished to me by Alessandro Zorat.
Internet mailing LISTS, Airheads Club & website:
New to Internet Mailing Lists? Especially if new to BMW motorcycle riding & riders:
Please click & read the short article!!
After which you may want to read this: click
"Airhead" is slang for a BMW boxer air-cooled twin manufactured between December 1969 and the end of production in 1996. "Airhead" does NOT include the boxer twins known as Oilheads, nor Hexheads nor Camheads, Waterheads, etc.
Please post inquiries to the Airheads LIST for Airheads questions.
Post to the Kbmw list for Classic K bike questions.
Post to other LISTS below, as appropriate.
By posting to the appropriate LIST, your questions, and the answers, which may come from several sources on that LIST, will help more than just yourself. This helps me, as I can not keep up with individual replies......I need time to eat, sleep, and have a life!
The clickable places below show how to join the Airheads CLUB, and how to become a member of its FREE internet LIST. The airheads.org website contains extensive technical articles, some of which I wrote.
Try not to confuse the Airheads.org website with the Airheads internet mailing LIST, nor the Airheads Beemer Club. Many if not most Airhead owners are members of all. When a paid member of the CLUB, you receive the monthly publication, AIRMAIL.
Airheads CLUB website: http://www.airheads.org
You can join on that site; or, obtain a snail-mail form, copied from the last page of the monthly Airmail, from a Member.
All the E-mailing LISTs I have noted in this longish section are primarily for technical information, and are best for immediate personalized technical advice.
You can subscribe to the AIRHEADS LIST by going to the following URL, scan down a bit, and follow directions: http://micapeak.com/mailman/listinfo/airheads
Snowbum is a Moderator on that List.
I highly suggest you do NOT use the Airheads List Digest mode, it is much less helpful than you might think. Digest mode WILL...or MIGHT... require YOU to do much more editing in replying. Failure to do that editing is VERY annoying for you and recipients on hand-held devices, and excessive message length costs money for those that pay by the byte. Without proper BASIC editing you will post entire digests with your replies...a BIG NO NO!
Hint (this applies to any E-mailing list, Airheads is the example here):
Put email@example.com into your computer E-mail address book, perhaps using a nickname such as "Airheads"; so you don't have to type the full address when YOU post a message. Most E-mail programs can do this. If need-be, set your program to accept LIST messages. You will post and receive mail to/from: firstname.lastname@example.org.
I suggest you set your outgoing messages for PLAIN TEXT. You cannot post html (images, colors, etc.) directly to the Airheads LIST.
To see all the Micapeak mailing lists and to sign onto any of them:
***NOTE: Micapeak.com does NOT spam you, does NOT sell or otherwise pass out
your E-mail address. Micapeak.com does NOT put advertising into your
or other folks E-mail messages to their Lists.
THE major sidecarist's technical LIST is http://autos.groups.yahoo.com/group/SCT and
Snowbum is active on that LIST, and is a Moderator. It is usually moderately quiet.
The SCT in that address stands for SideCarTalk, which is of no special importance
at all, it is just how the LIST was named.
Technical LIST for EML sidecars: http://groups.yahoo.com/neo/groups/EML_SCL/info
Snowbum is active on this LIST, and is a Moderator. This list is primarily technically oriented. Typically rather quiet. The SCL in that address stands for SideCarLounge, which is of no special importance at all, it is just how the LIST was named.
Western USA branch of the United Sidecar Association: http://groups.yahoo.com/group/USCAWest/
Snowbum monitors that list. It is primarily for chit-chat, places, people, events, etc. It tends to be very quiet.
You may also be interested in http://www.sidecar.com which has a LOT of sidecar technical information that is FREE.
If you own a Classic K-bike (K1, K75, K100, K1100), join the K-bmw mailing LIST.
Snowbum is active on this LIST, which is primarily technically oriented:
There is an Internet-based FORUM for the K1200-K1300 series: http://www.k-bikes.com
Snowbum is not on that list.
There is a K11 owners group list. The site is quite active in the FORUMS section.
www.K11OG.org Snowbum does not normally participate.
Sometimes known as "The Big LIST", the following website covers all BMW motorcycles, with lots of technical things.
Snowbum monitors and sometimes participates on the IBMWR tech list.
Oilheads, Hexheads, Camheads, K bikes: http://bmwsporttouring.com
Snowbum does NOT monitor nor participate here.
Some other important LISTS and FORUMS are shown in this Technical Articles List page in the K bike or Oilhead areas.
NOTE: the BMW Motorcycle Owners of America has forums on just about every BMW product since BMW began, right up to the present moment. You must be a member to access and participate. Snowbum participates on the BMWMOA Airheads forum now and then.
The LAWYERLY legal stuff:
The information on this website is provided at no cost and without any warranty whatsoever. It is my personal information/opinion, which you may use at your own discretion for personal use only. Your usage does NOT make me liable for any problems. Improperly maintained motorcycles can lead to serious injury or death or unavoidable accidents. I am not responsible for any errors contained herein, and I make no claims whatsoever as to the safety, validity, or veracity of the information contained in these documents. Any use of the information contained in/on this website, that leads to any work you choose to do or not to do on your or anyone else's motorcycle is done at your own risk. If you do not know what you're doing, take your motorcycle to a reputable shop with skilled professional mechanics. The instructions & information contained on these various pages merely document how the author may do his own maintenance.
MOST of the articles on this website are copyrighted. ALL ARTICLES WRITTEN BY ME AND LISTED ON THIS PAGE, OR OTHER PAGES, ARE COPYRIGHTED (unless otherwise noted). My copyright exists whether or not you see the © copyright symbol. NOTE! In general, my technical article pages show a copyright date at the top, and at the bottom. These are NOT necessarily the date that the original article was copyrighted by me. I change the year date if it does not agree with the present year, when I make an update to content or other information associated with that page. You are granted use for yourself, printed or electronic copies. You are also granted approval for incorporation by reference or hyperlink to my articles for many other uses. You must not abridge, modify, shorten, or otherwise edit my articles, unless it is made clear that you are doing so, and YOU MUST prominently note any change in INTENT, or INFORMATION. You are NOT granted permission to DUPLICATE my articles, in part, or entirety, without prior permission from me, except as above noted. Commercial duplication; or, editing and publishing in any manner the content or part-content of my articles; and/or failure to quote me as the source/author, use of plagiarism, etc.; including sale or other commercial activity, beyond what is specifically herein allowed without specific permission, will result in public announcement of same, and may result in prosecution under the laws of the United States. These are NOT idle threats, I HAVE gone after those who plagiarize and misuse my written articles. I'm VERY protective of my articles...but I will usually grant you usage beyond just for yourself...so ask! On purpose I do not make money off my articles (except if someone clicks on a Google Ad-Sense advertisement), and I don't want you to. I also do not want you copying my material to disc or other media, and then selling them, even at cost, even for just the hard materials.
Keep in mind that I update my website constantly, and only the on-line version is going to be the most accurate and up-to-date.
You do NOT need my permission, if you follow the preceding, to use my TECHNICAL material in many ways, but if you have any questions, you may e-mail me. e-mail
One of the things that REALLY ticks me off, is misquoting me; and even more-so, is modifying my articles, or parts of them, and then claiming them as YOUR work. I WILL pursue you LEGALLY for MONETARY and other damages if you plagiarize from my articles! This is NOT an idle threat!
CREATIVE COMMONS are two words that describe a way for a copyright holder (that's ME!) to grant YOU permission for MY WORK to be copied, distributed, or adapted...IF....certain conditions are met, that is, 'Some Rights Reserved'. So, to keep this simple: You may use my work if you keep my name with it, and you LINK to my original work (and modifications or additions or comments by you are prominently so-noted), and if such are not misleading to those who might read or see my material. You may use my material ONLY for non-commercial purposes, unless you have MY permission. Creative Commons does NOT grant you unlimited rights; in many instances you NEED APPROVAL FROM ME.
If you have a website, & your page where you have placed something from MY website (or a hyperlink to my website, which is always appreciated!) has advertisements that pay you income if folks reading your website click on those ads, I DO NOT consider your webpage to be commercial use, so I do NOT restrict your use of my material on such a page, so long as your usage is within the rest of my above and below information on my Copyrights.
Keep in mind that I frequently update articles on this website, sometimes every day.
This is important if you use a
search engine that saves
on the date they scanned
them and doesn't update pages until they are next
when that is (no matter the coding I use to try to get their robots to do it more
often). An OLD scan MIGHT or MIGHT NOT be
listed as 'cached'. It is best
directly to this website's HomePage, and from there go to the Technical Articles List page. The
contains access to MANY things NOT on, nor accessible from this Technical Articles List page you are now looking at.
Going from the HomePage to this article's list (via the link at the bottom of the HomePage) will 100% of the time give you the LATEST version of an article by then clicking on it in the long list.
Please pay attention to what I am saying in this paragraph!
I suggest you Bookmark ('Favorites') the HomePage, and
NOT the page you are
at right now.
Click HERE: http://bmwmotorcycletech.info
and bookmark (favorites) THAT URL.
Important revision/editing dates are shown at the bottom of all pertinent pages/articles and such revision date is also shown in this Technical Articles List Page.
I request that errors or omissions on this website be reported to me, and such are welcomed. That includes helpful comments! (Even UNhelpful comments!) (except complaints about fonts and colors and verbosity!)
My technical articles are © copyrighted, reading and use beyond this point constitutes an implicit acceptance of my terms and conditions!!!
Our bikes are getting old; the oldest Airheads are now officially regarded as ANTIQUES. You can NOT rely
dealership for repair work,
nor for the proper
parts and parts numbers. Dealership personnel may
well NOT have the proper knowledge nor background.
DO strongly consider independent repair centers, especially ones that participate on LISTS & FORUMS.
I DO recommend certain shops, and individuals, upon request. Especially see my pages 78A and 78B, below.
BE CAUTIOUS ABOUT WHERE YOU GET WORK DONE, WHERE YOU PURCHASE PARTS, EVEN WHEN FROM BMW DEALERSHIPS! CHECK MORE THAN ONE SOURCE FOR INFORMATION, PARTS, AND WORK. BMW sometimes has incorrect part numbers, and sometimes ships the wrong parts or poorly made parts. Be careful when ordering from companies, foreign or domestic, that may not be selling genuine or REALLY equivalent BMW parts. BMW has published ERRORS! These published errors get compounded (passed along) when re-published, by such as Clymers or Haynes! In some instances I DO have "corrections to Clymers or Haynes, etc" type of information on this site.
If you cannot easily find what you want in my website
from searching manually,
then click here:
That search page has information on HOW to search, plus the actual search function. The search engine for this website is VERY good, but if it does not work for you, you probably have settings in your computer that are restricting the search engine.
Airhead, K, and household things to sell OR TRADE (AND...things I want): Click!
"There is always a greater idiot."
Make something idiot proof and you will
eventually see a demonstration of this saying.
A common mistake that people make when trying to design something completely foolproof
is to underestimate the ingenuity of complete fools.
"The measure of a man's character is what he would do if he knew he
never would be found out." - Baron Thomas Babington Macauley
"An expert is someone who has made all the mistakes which can be made,
in a very narrow field." --Niels Bohr
"...You cannot prove a vague theory wrong. Also, if the process of computing the
consequences is indefinite, then with a little skill any experimental results can be
made to look like the expected consequences." Richard Feynman, 1964
There are three kinds of men:
The ones that learn by reading. The few who learn by observation.
The rest of them have to pee on the electric fence.
- Will Rogers
"We have all heard that a million monkeys banging on a million typewriters will
eventually reproduce the entire works of William Shakespeare. Now, thanks to the
Internet, we know this is not true."
"There is no practical reason to create machine intelligences indistinguishable
from human ones. People are in plentiful supply. Should a shortage arise, there are
proven and popular methods for making more."
Under democracy one party always devotes its chief energies
to trying to prove that the other party is unfit to rule
--and both commonly succeed, and are right...
What's with that lamp, above?
Interested in the yearly SuperTech Weekend?
Click HERE for details!
Always something new around here!
All the technical information on this site is:
Don't trust a mechanic without an attitude. Folks who know how to do things have opinions, & opinions aren't changed easily.
My 1984 R100RT bike, parts & many special tools,
was sold. The present owner and I
have shared this bike in the past.
Hyperlink to a humorous article on this website, 'A Winter Tale': CLICK!
All the technical information on this site is:
If you want to donate to help defray costs, click: DONATING
That page also has information on how I run this website, without my being obligated to anyone....and MORE.
BMW numbers its motorcycle (and cars!) parts and service, ETC., by GROUPS and sub-groups. A .pdf file showing all of these is available if you click on this:
Snowbum lives at Lake Tahoe, California. Click
|R45 & R65 OWNERS Manual
in pdf format
|Not all that proficient at editing your E-mails? Want to know how to do that, and a lot more? Special symbols? Foreign computers? ETC: CLICK|
||Who the HELL is Snowbum?|
|For SALE...and WANTED: CLICK!|
For newer BMW POLICE bikes:
FUEL System in your Airhead motorcycle
(An article on fuel mileage, in depth, is #81)
1A. Fuel filters, petcocks, fuel flow, re-fueling, clamshell
setting. rev. 09/02/2014
Additional information is in article #1B and 12A
1B. Fuel caps: Removing a bad cap; R/R locks; venting problems, ETC.
2. Luftmeister Auxiliary Fuel Tanks rev. 10/09/2012
3. Carburetors PART 1, overhaul; GENERAL NOTES, HINTS, floats testing,
leaking tops & dome inserts, tricky enrichener discs/shafts assemblies,
Bing Independent Float Kits (see 5 below for all those details), ETC.
Be sure to read article 6, below, yes, even if you do not have a /5.
Bing Carburetor PART 2, overhaul; GENERAL NOTES, high altitude JETTING
changes tuning, hard-starting (some), ETC. rev. 10/09/2013
5. Bing dual-independent float kit rev. 02/08/2014
6. Early Bing CV Carburetors used on
R75/5, idle problems, ETC!
This article has some information that applies to ALL Bing CV carburetors,
so I suggest you READ IT!
Carburetors; the whole story, in awful depth.
7B. Throttle & clutch cables; speedometer cable rubber boot at transmission;
Control assembly perch's. rev. 08/08/2014
screws; friction & anti-friction devices; Snowbum,
RUNNING! rev. 06/23/2013
9. R80 fuel mileage problems; R80 airbox modifications. rev. 10/13/2012
10. Tuning Intake and Exhaust systems rev. 11/28/2012
11. Removing &
plugging the Pulse Air and Evaporative emissions & fuel shutoff
systems (also: how they work) rev. 12/13/2013
Fuel System: Tank cleaning; premium vs regular;
additives; TEL; alcohol;
fitting other tanks & seats. Throttle and choke cables. Fuel hose.
See article #1A and #1B, above!
>>>>An article that describes Lead Substitutes, in depth, is here: VALVES
which is article 60, sub-section 5.
12B. Bing carburetors that unrinate.. weeps, leaks onto your boot, onto the ground,
floor, garage, grass, wherever. rev. 11/04/2012
12C. The K & N air filter, the UNI air filter, stock air filters, .....etc. rev. 11/20/2013
13. The Dell'Orto
Huge amount of information on how ALL types of carburetors operate,
especially needle/slide types, but also vacuum types and in particular
the Dell'Orto carburetors. SPECIFIC information on Dell'Orto settings for
Airheads; where to obtain parts. A link to an article on converting an
Airhead to use the Dell'Orto (only the R90S CAME with them). Links to
other carburetor articles of considerable value. Links to the factory DellOrto
manuals (ON this website!) are also here. There are MANY sketches/photos
in this article. Allow TIME to load up if you are on a slow connection.
find what you wanted in the above FUEL SYSTEM articles
Use the search engine: SEARCH
This is not
an article by me, but a link. Truly
curious? Technically minded? This long
describes octane, gasoline, leaded fuel, unleaded
There are interesting things here and there
this article, from which you could
to other parts/versions
by re-arranging the URL.
All the technical information on this site is:
If you want to donate to help maintain this website: DONATING
14. How to buy & use test lamps and multimeters, basics+. rev. 08/11/2014
Troubleshooting BMW Airhead Boxer
systems; includes battery and charging information rev. 03/11/2014
Lots of good basic electricity information here; plus troubleshooting.
Also see article 15.
Critique of the ChiTech Electrics School Manual; plus
information rev. 07/31/2013
14C. Here is a hyperlink to an article that describes how relays work.
But, this linked article DOES have just about everything you need to know
about how relays, including Bosch/DIN numbered pins types, actually work:
***NOTE: the last time I tried that link, it asked for sign-in, but after a few seconds, that
disappeared and the article did appear.
15. Electrical hints and problems; descriptions of functions, ETC.
Alternators: WHY 3 phases? The STOCK Bosch, substitutions,
Troubleshooting the Alternator, Charging
15-C. Aftermarket Alternators: installation, capability, performance
15-D. Really BIG alternators on Airheads rev. 07/26/2013
15-E. Why do alternator rotors fail? How to replace a bad rotor.
What about the reliability of the EnDuralast? Omega? rev. 09/12/2014
16-A. Starter & Starting Problems; Valeo to Bosch; Bosch to Valeo; FIT problems;
Denso starter install; starter relays; solenoids Rev. 09/12/2014
16-B. Troubleshooting the Starting System & variations. rev. 09/13/2014
17. Alternator rotors, stators, brushes, cautions, DETAILS. rev. 09/13/2014
18. Diode Boards & Grounding Wires; information on testing power diodes)
19. Alternator 'GEN' lamp circuit & resistor (AND, possibly LED) modifications.
20. Testing Voltage Regulators; high output and/or
21. Servicing a Bosch Mechanical Voltage Regulator (INCLUDING
Making adjustable the Bosch & Wehrle ELECTRONIC METAL CAN Voltage
Regulators rev. 09/14/2014
23A. Increasing the voltage output of the Wehrle PLASTIC voltage regulator
(for tinkerers and nerds) 10/15/2012
23B. Schematic diagram of one version of the electronic voltage regulator
24A. Lamps. Adding relays, lamp substitutions, larger headlights,
MODULATORS, sockets, updating /5 headlight, heavier wire,
LED's, HID, ETC. rev. 09/14/2014 see also 24-C and 34.
24B. How the headlight switch & relay works. Understanding the finer details of
information in article 24A. Airheads, Oilheads, K, etc. rev. 09/15/2014
24C. Headlight modulators. Federal Law. California Law. Technical details.
Links to sites with the laws and regulations, + ALL types of motorcycle
lighting; headlight brightness, links. rev 09/15/2014
25. Replacing a 5 speed neutral
switch (& selecting the correct switch)
26. Metric & American Wires, Colors, Bosch
wiring Codes, wire sources;
information about schematic diagrams. rev. 08/28/2014
27. Installing an accessory electrical outlet, precautions, etc. rev. 05/06/2012
28. Ignition Theory; Spark Ignition Systems. rev. 09/15/2014
timing; automatic advance units for single and dual-plug engines;
single spark plug Airheads; points; condensers; amplifiers; COILS, etc!
IGNITION: Points; Timing lights; Ignition
Modules; Ignition Canister
(rebuilding yourself or sending them out); Coils; Spark Plug Suppressor Caps;
Dyna & Boyer Ignitions; rubber sealing strip; sources for modules & Hall
sensors; testing & troubleshooting (including HIGH IDLE RPM); Points
Boosters/Amplifiers. rev. 09/17/2014
Some of the Hall sensor information applies to the K and Oilhead bikes.
highly recommend you read both #29 and #30, above; as an
both articles may well be needed if you are contemplating changes or repairs.
Here is a link to an article on the diagnosis and repair of the Oilhead Hall
Effect ignition sending unit. This article has some explanations & details that
may help you understand the Airhead electronic ignition.
31. Dual Plugging (and for all Airheads, discussion on milling heads,
shaving cylinders, etc.) rev. 09/17/2014
32. SPARK PLUGS;
threaded holes; torques; ANTISEIZE (OR NOT),
caps & wire assemblies; resistor & non-resistor spark plugs for Airheads
& K-bikes. rev. 09/17/2014
33. Ampmeters (ammeters) v. Voltmeters (and voltmeter problems) rev. 04/27/2014
34. Adding Running Lamp Function to Turn Signals rev. 04/27/2013
35. Rejuvenating a battery? Filling a new 'flooded' battery & initializing
other battery types; which battery to purchase; sources; usage; chargers
(SMART or not); peculiarities. Charging voltages. How to Load Test a Battery;
ETC. rev: 05/19/2014
36. Accessing the headlight bucket on RS/RT, cleaning headlamp/glass,
aiming a headlight rev. 10/03/2012
37. Slash 5 (/5) starter relay 'cricket' noise & starting
problem. Slash 5
(/5) bikes with stock starter relays SHOULD RECEIVE THIS MODIFICATION
37A. Tachometers: connections, wire colors, retrofitting to earlier models;
checking calibration (mechanical OR electronic type) rev. 09/18/2014
37B. Broken brake light switches (front & rear); stiff K bike throttles for 1985.
38A. CAN-Bus, OBD-II, ....what is this??. How it works. What about the future?
Telematics? rev. 08/16/2014
Regarding section 38B onwards to the end of 38x:
I have obtained schematic diagrams posted on this website from a variety of sources. NONE are from the excellent Chitech BMW Electric School Manual, which is still offered for sale. MANY schematics in it are very difficult to read, some are quite fuzzy.... but I DO recommend you purchase that manual, see my URL page for how to obtain a copy. There is a critique, with some corrections, that I made for that manual: chitechelmnl.htm
I PROBABLY HAVE every schematic diagram for every Airhead (& most other BMW models to 1996 or so). My collection includes most all of the World versions, so there are literally HUNDREDS of diagrams, including accessories ...even such as the early Airheads when they were available with Avon fairings! Diagrams include those for heated grips, special lighting, & Authorities (Police) models. Tthere are CONSIDERABLE similarities between various models, enough schematics are on this website to enable you to work on your bike.
If you need to contact me for a specific diagram, or perhaps something is not clear to you about a schematic on my website, ask on the Airheads list or K bike list or ibmwr.org tech-list, as appropriate, FIRST. When you post to a LIST, I would like to know what the problem is, if any, whether an interpretation or specific ill, AND, if you need a schematic for the main frame diagram, or engine or some sub or accessory item that is not already covered on my website. I will need to know your BMW model, its year, and if it is a USA or Euro. It would be very helpful if you knew the model code that BMW uses for your motorcycle. If you do not know the model code, DO furnish the full serial number or VIN number.
Sometimes questions you may have will be answered by referring to my electrical hints article #15, or some other article in the Electrical section of my website.
Regarding AIRHEADS electrical schematic diagrams:
The R80G/S is similar to the R45, R65 and R80ST.
The R65, ST, GS & G/S type of instrument pods will be similar, or nearly so.
RS and RT may be identical to each other.
The R75/5 will use the same diagram as a R50/5 and R60/5.
The R60/6, R75/6, R90/6, R90S will all be very similar.
The /6 and later with the early style-type of pod (pod NOT like the R65, ST, G/S, GS)
will generally have those pods in common; differences are few, and are noted in
The /7 is mostly similar to the last of the /6 series.
This same sort of schematic similarity is found on Classic K bikes; which have only a few differences such as lighting, whether 3 or 4 cylinders (ignition is primary schematic difference); and for the fuel injection computer, whether Jetronic or Motronic. ABS? Then whether ABS1 or ABS2.
Here is a link to a German website,
that has a LOT of Airhead (and some R1100 oilhead & other) electrical schematic diagrams. You will have to snoop around a bit (probably) & click on the Shaltplane or Shaltplaene. This website keeps getting re-arranged & the
actual address for the diagrams to be selected by you keep varying.
Might be best to just go to the homepage:
http://www.powerboxer.de & start from there. But,
you can try the addresses below, it may work!
NOTE: Some of the schematics on BMW's OWN CD of schematics, for early eighties bikes, are wrong in some areas. This also MAY apply to 1 or 2 of the schematics for these later bikes (after 1980) on this Snowbum website, but I
Links for more electrical schematics, etc., are found in article #80, below.
|Some BMW schematics will show things NOT on YOUR bike, which were special equipment or added accessories.|
38B. Miscl. Electrical schematics for Hazard flasher system, fold-out
fog/driving lights, heated grips, VDO instruments. Replacing a /6 left-side
handlebars switch. Substitute voltmeters and clocks. rev. 05/09/2013
38C. Schematic diagrams
in three formats: .gif; .pdf; and .bmp;
for R90S, R60S, R75/6, R90/6; for 1975 & into 1976. 10/13/2012
38C+. Schematic diagram for 1974 model, /6 series, EURO, type 0271
38D. Schematic diagram for the 1978 Airheads, as .pdf, includes legend.
38E. Schematic diagram for the /5 electricals, last model, fused, .pdf
38F. Schematic Diagram for both early and late /5. Early model had no
fuses. Set your browser to expand the image as needed, it WILL be clear.
38G. Schematic diagram, 1981 R100, R100CS, as .pdf
SIMILAR to many of this era. See just below too.
Schematic diagram, 1981-1984. A different type of sketch than the above
one. This is a schematic done by someone in Germany. Compare this to the
above one. 1983-4-showing-module-ignition.pdf
Legend for the numbered and lettered "items" in this schematic: legend
38H. Schematics & wires colors diagrams & descriptions for 1981-1985 R65,
R65LS, R45, R80ST, ETC. .jpg, and .pdf rev. 10/13/2012
Schematic for the above bikes, but EURO version: CLICK
38I. Schematic diagram for 1979-1980 R100RS, series 0427 as shipped to various
countries, full base diagram. .pdf format
38J. Main lighting diagram (only). .pdf format, covers above and into the early
38K. PDF diagrams for R100GSPD:
38L. Schematic diagram and Legend, 1989 and later R100RS/R100RT, USA,
pdf format, TWO pages
38M. Replacing a /5 ignition switch with a round barrel type switch:
Here is a link for a KIT to basically do a barrel switch installation:
38N. Radio codes: Key OFF. PRESS and HOLD "M"; turn key on. If code does
not display, then contact dealer or radio shop. You should have written
the code down when you purchased the bike!...it came with it!
SOURCES FOR ELECTRICAL PARTS FROM OTHER THAN BMW ARE LISTED IN SECTION 78A & 78B.
Electrical contact cleaners and treatments are in article 73.
Mechanical? Electrical? Stuff I'm not sure where else to put these things!
39A. F, OT, S,
and Z marks on your Flywheel (clutch carrier);
re-marking, alignment, degreeing camshafts....ETC rev. 5/21/2014
For Automatic Timing Units, in depth, see article 29.
39B. Mis-adjusted carburetors and/or sticky automatic timing units can cause
high rpm, typically after full warmup. See article #30, which has a section
on just this problem.
39C. How to safely transport your motorcycle (like in a truck or trailer, etc.)
1974 and later Instrument housing covers, screws, broken inserts, etc:
39E. Buried traffic light detection loops; bike triggering problems with them.
39F. NERDY stuff....you'll never know what is HERE
39G. /5 instruments...and article on disassembly and repairs, etc:
Also See Article 48
39H. empty on purpose
I suggest you "bookmark"
(Favorites) the HOMEPAGE, and
NOT the page you are
at right now.
The HOMEPAGE is http://bmwmotorcycletech.info
At the bottom of the HOMEPAGE there is a DATE for the last revision. Revision/Editing dates are ALSO listed at the bottom of NEARLY ALL OTHER pages/articles. The homepage contains access to things NOT on, nor accessible from the Index of Technical Articles list page you are now looking at. Going from the homepage to an article, via the link at the bottom of the homepage will ALWAYS give you the LATEST version of the article.
Mechanical Systems, Miscellaneous, and 'other stuff':
Valves......how to do it correctly. ALSO: What happens when
a valve comes apart and tries to destroy the engine. rev. 08/21/2013
After reading this, I recommend you read article #60 section 1; and
60-6 and 60-5; all are below.
41. Overheating, excessive idle time, etc. rev. 09/22/2014
42. The pre-1970 slinger service; including the /2 slinger service (yeah, yeah a /2),
Transmission input (clutch) splines, throwout bearing,
clutch arm cleaning,
lubrication & inspection, adjusting swing arm. Rev. 09/22/2014.
See also: CLUTCH article, Section 60, item 9, below...which has extensive
information on the throw-out bearings, and everything "clutch".
BOTH these articles should be read! See #7B about control cables.
44. Maintaining the
paintwork, aluminum, windscreen & helmet
how to drill plastics safely; how to repair cracked luggage; how to repair
fairings. rev. 10/23/2013
Article 73 has information on products to use to maintain plastic visors,
shields, ETC. Also See article 75
Rear Wheel Splines; Rear Drive Output Splines; Rear Drive Oil Leaks;
Replacing a Rear Drive Left Seal, Inner seal, Nose seal; Oil Leaks with
Drum Brakes; Leaking oil drain plugs; Monolever & Paralever Cardan
Bearings; Rear Drive overhaul, Rivets, Wheel Cup; ETC. Rev. 04/01/2014
Exhaust pipe finned (spider) nuts; recommendations for exhaust
replacements rev. 09/27/2012
47. Driveshaft Bolts, Washers, Torque, tools rev. 03/29/2014
48. Ring & pinion gears, ratios, speedometers/odometers, instrument pod repairs,
instrument numeral colors, rpm, road speeds, numeral colors. rev. 08/06/2014
also see article 39G
Transfers; oil/water moving someplace (or leaks). Filling
50A. Oiling system; oil
consumption; thermostat; cooler; pressure bypass valve
in filter canister area; remote & other oil filter kits, ETC. rev. 10/12/2012
50B. MORE on the BMW Airhead Oiling System: Sketches,
thermostats; oil breathers. Rev. 07/14/2014
50C. Oil Pans; oil pan gaskets; oil pan threads, oil capacity; dipsticks;
oil pickups, WINDAGE. rev. 02/13/2014
50D. Oil Coolers; including installation. 09/24/2012
51A. Oil & filter change. 'Reading filters'. The "$2000 O-ring" ($3500 if you ruin
your crankshaft). Thermostat covers; LOTS more!
INCLUDING spin-on oil filter conversions. BMW airhead motorcycle Oil and
Filter Changes; etc. rev. 08/02/2014
51B. Oil filters, canisters, ETC. Information on changing your filter, types
of oils for your airhead, oil additives; gasoline additives
Rev. 03/12/2014 Suggested reading: oilessay
51C. Oil lubrication tech;
recommendations, ZDDP; synthetics, etc.
Airheads, K-bikes, etc. Rev. 09/07/2014
51D. Oil viscosities, viscosity indexes, engine oils, gear oils, suspension/fork
fluids, shock absorber fluids,SAE, SUS, Cst, some ZDDP values. BMW
factory recommendations for viscosities. Rev. 08/04/2014
52. Pinging (Pinking); LUGGING; piston detonation. Causes, effects, cures/fixes.
53. Brakes; all-about them. Rebuilding ATE MC. SS lines.
Conversions/upgrades. rev. 08/30/2014
54. Wheels, Tires, Axles, Hubs, Bearings, Steering Head, Forks, Seals/spacers,
tires, dampers, ETC!
Section 1: 19" wheel recall rev. 05/03/2011
Section 2: Wheel spoke lacing and alignment of hub/rim rev. 04/06/2013
Section 3. Tires, spacers, wheels, balancing of wheels/tires; hints; LARGE
VARIETY OF STUFF HERE. rev. 04/17/2013 Also contains info on
swapping various years/models of wheels (except Lester's, see
Section 7 below). I suggest that you also read Section 5, below.
Section 4: Wheel bearing preload & servicing wheel bearings. Some other
wheel information also. rev. 05/07/2014
see Section 9, below
Section 5: Tire tests, reports, recommendations. Hydroplaning;
tire width top hat spacers; nitrogen; selecting tires (things you
never knew); rev. 04/23/2014
I suggest you read Section 3 above and Section 6 just below!
A LOT more tire information will also be found in Section 12,
below; including a section on vibration/thrumming, etc.
Section 6: Tubeless versus tubes. rev. 07/04/2014
Section 7: Lester wheels rev. 09/04/2013
Section 8A: Steering dampers; shock absorbers & springs. rev. 10/14/2012
Section 8B: Ikon and Koni shock absorbers spring chart; a pdf file
Section 9: Airhead Wheel Bearing Clinic++, BMWMOA National Rally,
July 2005; critique of BMW-ON magazine articles of 2004.
Updating information. rev: 04/15/2013
Also see 54, Section 4, above
Section 10A. Front forks internals description, alignment, stiction, braces,
gators, cleaning & lubricating (or replacing) steering head
bearings; springs. In-depth discussion of STICTION & setting
fork sag. Hints regarding front fork internals. Modifications.
Adjusting swing arm bearings. rev. 04-11-2014
Section 10B. Front Forks: Oil filling amounts; pre-Airheads, Airheads,
K1, K75, K100, K1100
Section 10C. Instability; weaving, wobbling, tank slappers; the REAL
information. Rev. 09/09/2013
Section 11. Hyperlink to Anton's website wheel balancing
Section 12. TIRE REPAIRS. TIRE PRESSURES. Studding. Includes a section
on vibration/thrumming, etc. rev. 07/02/2013
55. Maintenance Schedule rev. 09/20/2013
56. Cold Weather Starting rev. 09/23/2012
57. Noise Silencing Pads For The Cylinder
Fins rev. 10/13/2012
58. Importing a motorcycle; EPA, DOT & Customs rev. 10/04/2012
59B. Emergency Shifting tools for 5 speed transmissions Rev. 08/28/2012
60. ENGINE & CLUTCH:
heads, pistons, rings, cylinders, break-in;
Helicoils; Spigots (intake stubs); Timeserts; cylinder studs; pulled
threads, ETC. rev. 07/08/2014 You may be interested in reading
articles 40; 60-5, and 60-6
Section 2: Flywheel (& also Clutch Carrier) removal/replacement WARNING;
MAIN SEAL & O-ring, oil pump & its cover and seal. Rod bolts.
Re-installation of Flywheel, seal installation photos.
Factory bulletin on new style seals. Front crank bearing carrier.
Grabby clutch, vibrations, hard shifting, and idle rpm change with
clutch lever use due to excessive end-play. rev. 08/03/2014
Section 2A: Lightened flywheel information rev. 10/09/2012
Section 3: CYLINDERS, all about, plus shims/gaskets rev. 07/25/2014
Section 4: Pistons (including swapping heads-cylinders-pistons), rings, pins,
clips, keepers, decarboning. rev. 06/13/2013
Section 5: Valves, valve seats; leaded fuels; guides, valve springs, aftermarket
valves, noisy valves, bead-blasting, ETC. rev. 07/25/2014
You may be interested in reading article 40, 60-1, and 60-6
Section 6: Rocker arms, rocker arm shafts and bushes/bearings, valve gear,
pushrod tubes, cylinder heads. Aligning the /5 valve gear.
You may be interested in reading articles 40, 60-1, and 60-5
Section 7: Camshafts, broken cam tips, cam sprockets, lifters (followers),
alternator & cam seals, crank nose bearing. ZDDP. Sports Cam
installations, duration, timing, etc. rev. 08/05/2014
BE SURE TO SEE SECTION 60, SUB-SECTION 2, ABOVE.
Section 8: Replacing pushrod tubes & seals; Pushrods; Valve cover studs;
sealing cylinders. rev. 09/01/2014
Section 9: Clutch: arm, flywheel, carrier, bolts, upgrades, throw-out
bearings. Cables, stuck clutch, clutch lever, lever
lever bushing. Preventing broken transmission ears.
Adjustments. Rev. 08/15/2014
I recommend that you also read article #43
61. Long Distance Touring rev. 08/11/2014 ;
62. Timing Chain; sprockets; guides, wear problems, etc
Use this article with the cams article, #60, subsection 7
63. U-joint Phasing Photos, Paralever
Driveshaft models and any driveshaft
with Universal Joints. rev. 04/06/2014
Ride-off center-stands; luggage racks; tour rests, bag mounts,
trailer hitches, etc. rev: 12/20/2013
65. TOOLS (very extensive information) rev. 08/11/2014
66. Making a useful hydraulic jack, cheap rev. 10/04/2012
67A. Engine, Frame, and
other ID numbers. How to read
numbers, etc., how to identify YOUR BIKE. rev. 07/02/2014
67B. Model differences over the years. rev. 04/13/2014
68A. Part numbers for hardware and MANY other parts. Not just metal parts.
Sources not in REFERENCES 78B. Pozi & Phillips screws DISCUSSION &
INFORMATION; Locking methods discussion, ETC. rev. 09/12/2014
68B. The ROUNDEL; sizes, part numbers; BMW COMPANY HISTORY--IN DEPTH
69. Parts Coding
Symbols. How to read the symbols on ETK, fiche,
70. BMW Paint Codes 1970-?
Information on paints, powder coating,
sources, colors, codes, etc. rev. 01/21/2013
Torque Specifications & problems; conversion factors,
wrenches. Calibration checks. rev. 10/15/2012
71B. Torque values for various models. rev. 03/10/2014
71C. Changing torque wrench range; adjustment correction using extensions
72. Formulas & conversion factors rev. 10/09/2012
73. Chemicals, Oils (but NOT engine, gearbox, final drive),
Additives for oil and
gasoline, Greases, Electrical Contact Treatments, Antiseizes, Loctite,
Sealants, Waxes, etc. rev. 08/16/2014
74. Maintaining your leather items rev. 10/08/2012
75A. Luggage, Windshields, Locks
& Keys (except fuel caps), Instruments,
mirrors, etc. rev. 09/02/2014
SEE ARTICLE 1B for details and photos on gas cap problems!
See #44 on how to repair cracked luggage, maintain plastic, etc.
See #73 on products to use.
See REFERENCES "L" for luggage for more information.
See K bike section
75B. Albert mirrors
76. Miscellaneous: Fork filling; wobbles, weaves & tank
oversize drain plugs & washers; forks; side & centerstands; clothing,
heated clothing. ETC. rev. 05/09/2013
Information on seats interchangeability is in article #12A
76A. Those pesky easy to lose WEDGES that fit at the handlebar controls!
How to make one. This is a link to a sketch in .pdf.
The part numbers for these wedges are: 32-72-2-072-233; 32-72-1-232-929;
77. Modifications: Engine, Clutch, Suspension, Braking, transmission, etc....for
performance, reliability, & even racing. rev. 08/30/2014
78A. Useful URL's and sources for BMW motorcyclists; groups, forums, parts,
people, websites, companies, services. Editing E-mail messages. Printing
or sending special characters from your computer. Using foreign computers.
Lane-Splitting in California. rev. 01/03/2014
78B. REFERENCES: ADDITIONAL RESOURCES & information not in 78A nor 80.
Includes more URL's; e-mail addresses; contacts & descriptions; where to
get things, service, etc. Rev. dates are not listed for this article
79. Side-stands; Center-stands. Stock and Aftermarket. rev. 12/19/2013
80. MANUALS AND
LITERATURE; SOURCES, DESCRIPTION, CRITIQUE'S,
ETC. Not just BMW either. rev. 06/08/2013
Also see article 78B.
81. Lousy Fuel mileage; horsepower to attain high speeds; discussion of HP,
Torque, RAM-AIR, & LOTS MORE! rev. 03/05/2014
INSURANCE: motorcycles & sidecar
rigs; lots of things you probably did
not think about, or know! Negotiating with the insurance company.
82B. What To Do (and NOT do) right away if you've been in a motorcycle
accident. Advice from a Motorcyclist's Lawyer!
83. Bob's 'sleeper'
R75/5. My radical supercharged R75/5
84. See 7B about control and other cables and problems.
85. Foreign travel: Using foreign computer keyboards: see article 78A
got this far, and STILL did not see what you wanted?
There is a SEARCH Page! >>>CLICK this area
A FEW GERMAN WORDS YOU NEED TO KNOW: CLICK!
Oilhead motorcycle section:
O1. ABS brakes problems? Here is a link to an article on the R1100 and R1150,
how to reset the ABS:
ALSO See 14A & 14B in the K-bike section, well below.
O2. Salvage yards, for oilhead parts, etc: www.beemerboneyard.com
O3. See article #30, above, about the ignition Hall effect sensors.
An article dealing with a R1100RT sensor repair, will be found at
How to go about repairing the ignition sensors:
O4. R1100RT: LCD Temperature & Fuel Gauge Calibration; Fuel Sender Testing &
Cleaning, troubleshooting rev. 10/13/2012.
O5. Links to a website with good stuff for Oilheads, such as on the ABS system;
TDC locating mandrel, ignition timing box, etc. First, the main link:
This next link is to an article on the same website. It is on the diagnosis and
repair of the Oilhead Hall Effect ignition sending unit.
You may want to refer to my own extensive IGNITION article
O6. Bleeding/servicing the integrated brakes system....you may want to read these:
O7. Link to German website, with LOTS of Airhead (and some R1100 oilhead)
electrical schematic diagrams. Click on the Shaltplan, shown in red on that
page, for your model:
Those are GERMAN schematics, not necessarily for your USA or other
non-German-shipped country bike. Use these schematics in conjunction
with what you find on my website. There is a LOT of information besides
schematics on the German website.
O8. Death Rattle: Does your 850, 1100, or 1150 Oilhead, 1994-2004, make an
uncomfortable-to-hear rattle upon startup? Hexheads too!
Article describes the fix, with photos. The rear-view engine cut-away
photo is a REAR-view of an Oilhead motor. The Hexhead tensioners are the
same. Note that the left tensioner assembly is located on top of the cylinder,
"facing" downward, in a position that allows oil to drain out of the tensioner
sleeve during shutdown. The right side tensioner assembly faces upward from
the bottom, and IT remains full of oil during shutdown. This is why the
tensioner that is typically repaired is the left side one.
O9. Hyperlink to a forum-type website. Mostly on Oilheads, but some Hexhead,
Camhead, K. http://bmwsporttouring.com
O10. Hyperlink to an article on what belts were used, which to use, how to adjust
them, & at what interval replace them, etc.
O11. Oilhead HINTS rev. 10/12/2012
O12. Replacing an oil level sight glass rev. 10/14/2012
O13. Tool to lock flywheel and TDC locator:
O14. There is a new-style Teflon oil seal being used on ALL BMW motorcycles.
I expect it will be used at more places for replacement purposes, over the
years. The original Service Information bulletin is on this website:
O15. Adding running lamp function to turn signals, etc.
O16. Control Cables problems. Same as article 7B, Airheads section
Original owner's manuals (booklets) for
K1200; K1300 series;
S1000 series, etc.:
You may have to look for the owners booklets, BMW keeps changing the location on the website. The above is a shortened DISPLAYED HERE link, but is a FULL link. Allow to load up fully. When you see SERVICE at the top, click on it.
Allow to load, then click on the left side for Riders Manuals.
CLASSIC K-bike motorcycle
CLASSIC K-BIKES ARE K MODELS K1, K75, K100, K1100, K1200
Snowbum does not work on, nor have hardly much knowledge, about certain bikes, these are the K1300S; K1300R; S1000R; HP4; K1200S; K1200R; S675RR; K1600GT; K1600GTL; and K1300GT. For those, you might be interested in the following website:
http://bmwsuperbikes.com/ that appears to be a duplicate of http://bmw-k.com/
Snowbum is active on the K-BMW LIST:
http://motobrick.com Forum style. Classic K bikes. Active, lots of opinions, watch for awhile to sort out who knows, who guesses, etc. Snowbum isn't on this forum.
http://ibmwr.org The so-called BIG LIST. Has a section on tech. Lots of K bike stuff. Snowbum participates some on the techlist.
http://k11og.org/ The mainpage is seldom changed, that is, hardly ever anything added to it. BUT, the FORUMS are active.
K1100LT and K1100RS repair manual:
Classic K bikes model history, K1, K75, K100, K1100:
There are some things missing, and some that need embellishment, etc. There were changes in the rod lengths and pistons, the radiator got more fins, lots of little things also. But, Anton's list is a good one.
K1. Starter sprag clutch
problems in classic K bikes rev. 04/21/2013
K2. Hints, advice, parts, BMU---Bulb Monitoring Unit, etc. rev. 06/15/2013
K3A. A version of the K100 schematic: K100 Schematic Diagram, pdf format
K3B. K100LT, entire schematic diagram of whole bike. This is a pdf, made
directly from BMW's own information. It is for the UK ABS version.
In general, covers the 1987-1989 era, probably a bit more. K100LT.pdf
K3C. This is the LEGEND for the above, 3B, schematic diagram: LEGEND.docx
K4. Brake squealing, any model, and very especially the K75?...see article 53 which
DOES include information for K75, & all classic K bikes, for that matter.
That article also has a lot of information on bleeding the brakes!
K5. Salvage yard, for parts, etc.: www.beemerboneyard.com (973)-775-3495.
Some other salvage yards are listed in my references article (article 78-B).
You can also try: http://www.kbikeparts.com
K6. See article #30 ABOVE, about the ignition Hall effect sensors.
K7. U-joint Phasing photos, any U-joint driveshaft system, including Paralever
Driveshaft models rev. 04/06/2014
K8. K bike instrument pod; repairing & calibrating speedometer; clock modification
for 12 hour clock indication; Radio codes; ETC. rev. 04/24/2013
K9. K bike fork oil requirements rev. 10/07/2012
K10. Fitting handguards to a K1100LT (and earliermodels) rev. 10/07/2012
K11. Troubleshooting the LE-Jetronic classic K bikes (2 valve K75, 2 valve K100).
Register at: http://k100rt.aforumfree.com/
HUGE amount of technical information, and even a step-by-step article, but
you have to really search the site to find this stuff (especially by VOGEL)
http://hrsbstaff.ednet.ns.ca/bvogel/K100/download/efi-web page/K100 troubleshooting
K12. Front forks oil changing: See #9, just above. ALSO see
article Section 54, sub- section 10B. Also see 10A for fork alignment.
K13. Changing Coolant on a Classic K bike, discussion about coolants, all the fun
details (and more!). Heat insulation under the tank, etc. rev. 04/07/2013
K14A. If you need to have a fuel injection computer or ABS computer brain
Lots of good testing advice here too!
will get you the main page, lots of technical information there!
See above links, then Contact Tosi at: K100ABS@gmail.com
Highly recommended by several people.
Here is a place in the Netherlands that does all sorts of modules/computer
Re-manufacturing; 300 Myles Standish Blvd.; Tauntonk MA
(866) 573-2740; (508)-822-4490 http://www.bba-reman.com
I have TWO reports that do NOT recommend these folks, and none
that DO recommend.
K14B. If you are having ABS
codes problems, before you jump to conclusions,
remove both ABS relays, clean contacts and clean the relay connection
spades too, and add contact cleaner to them. This is also good advice
for the ABS main computer plug connections. Here are a couple of
articles to look at:
http://ibmwr.org/ktech.shtml Scan down for the ABS articles
K15. See Oilhead section, above, item #5, on the Hall devices. That article has
information applicable to the K bikes.
See my ignition.htm article too.
K16. Adjusting the steering head bearings on a K75, K100, K1100:
K17. Brake light switch problems....see article well above, #37B. If you have a
1985 K bike, and a stiff throttle, also read that article 37B...yes, a brakes
switch article! Info is well down the article.
K18. Hyperlink to a forum-type website. Mostly on Oilheads, but some Hexhead,
Camhead, K. http://bmwsporttouring.com
K19. Locks, gas caps, KEYS, etc.......I have an article, #1B and #75A, WAY above,
that covers all of these things in depth.
K20. See Airhead section article #30 regarding the ignition circuitry, lots of useful
information on the Hall element, etc. The following article, while for a R1100RT
oilhead, is useful for K bike owners; it is illustrated & is about replacing the
Hall sensors for a R1100RT sensor repair, & is SIMILAR for a K bike:
NOTE: If your Classic K-bike is having irregular ignition problems, and you can't find
anything wrong with the ignition, remove the valve cover, and check to be sure
that the cover is grounded to the engine by means of a coil spring that is mounted
to a cam bearing mount.
K21. Doing a rear main seal job is involved. Here is a video of the procedure to
R/R the main seal on a Classic K bike. Useful for anyone wanting to know
what/how in taking apart the bike....even if not doing a rear main seal job.
In GERMAN for sound. The mechanical support for the bike is flimsy in MY
opinion. They found one of the headers broken....in case you wonder about
the exhaust pipe being 'shown'.
K22. Information for Classic K bikes, NOT just the K100.
Many Service Bulletins here too:
K23. A lot of K bike information. Has all the wiring diagrams for has a lot of
information. In German, but very useful! Covers all the Classic K bikes (K1,
K75, K100, K1100, K1200), & lots more. Wiring diagrams are under Shaltpläne.
K24. How to replace an oil level sight
glass rev. 10/14/2012
K25A. Service Information Bulletin SI-2630R: failure to use all fuel in the fuel tank,
whining noise from the fuel pump. This is a link to a PDF file on this website.
The sketches are not very clear, so look at them with a critical eye!
If you can furnish a really nice clear copy of that bulletin, let me know.
K25B. Replacing a fuel pump: K1, K75, K100, K1100
K26. Engine oil, & lubrication in GREAT DEPTH: see article 51-C, ABOVE
K27. Worn rear drive splines? Bad U-joint? Upgrade?
see: http://www.brunos.us/Bevel drives.htm
and see the videos below (all of them!)
Doing a K75 rear drive input spline and driveshaft and swing arm lubrication?
This is a link to a how-to video, it's in German, but you will understand it. Note
that normally one does not pull the swing arm, in this video I suspect it was
done to replace the boot, and check the swing arm bearings.
Here are two videos on K75 and K100 rear drive spline servicing, Bruno's
driveshaft and rear spline rebuilding, etc.
K28. New style seal used on K bikes at the alternator drive:
K29. Link to a 6 part video series on how to disassemble and reassemble a
Classic K-bike, to do an input spline service. Includes a lot of service
and commentary on things the servicer found on this bike along the way.
Lots of good hints. Very complete, including the swearing.
K30. Control cables problems
K31. Re-keying locks, especially fuel tank lock; problems with the cap; and other
also: see my article 1B and 75A in the Airhead section of this site, EXTENSIVE
information in these two articles of mine.
K32. FUEL CAP on K bikes (and other bikes too). This is a
video. It covers R/R cap
internals. No information on keying locks.
NOTE: The "kit" in the video, 16-11-9-062-461R was sourced from Bob's
BMW. The "R" means Bob's is selling a repair kit. Be sure to get gasket
see my article 75A also
Adding running lamp function to turn signals, etc.
NOTE!....Some of my Airhead articles are informative for K bike owners. Examples are the References article (78B), which has information on driveshaft rebuilding and resources for many things; articles on the ignition, brakes, front forks, ETC. Many other examples of useful articles in the Airheads sections. Scattered in this long list of Technical Articles you are reading are stated references to Airheads articles that also apply to Classic K bikes, but I have probably missed a few. I suggest you look at the entire list of articles, and see what might apply to your Classic K bike.
I have a page that has some motorcycle (yes, some K bike stuff too) and personal stuff for sale (or TRADE!): click here
Previously Al Olme's sidecar rig. I had it shipped to me from
Minnesota by HaulBikes (also known as Daily Direct); whose service is highly recommended by me & many others, including dealerships. I removed the Police-type saddle & Authorities radio trunk prior to Penny & my 2008 trip across the USA, installing the stock seat & trunk. The Police/Authorities items have been sold. I have City-cases, as well as Tour-bags & use whichever is
appropriate. I often use the rig with the Tour-bag or City-case on the left (City-case on
right for easier access). On a long tour where I need
every cubic inch of space when Penny is along, I use the Tour-bag on the right. Specifications
below are in
brief, as I have done a LOT of modifications.
The SKUNK flag stands for Sidecars Up Nort Klub;
Up Nort stands for anyplace Up North of someplace.
is active (and a moderator) on the SCT sidecar LIST:
Same for EML Group: http://groups.yahoo.com/neo/groups/EML_SCL/info
SC1A. The good
points, the bad points, literature and information: an overview of
sidecaring basics rev: 03/28/2014
SC1B. List of Sidecar groups on the Internet rev: 10/14/2012
SC1C. Hyperlink for the Evergreen Council group training schedule for Basic &
SC1D. Hyperlink to a website that has a lot of photos, videos, links, etc., about
sidecar traveling, much is out of the USA, some videos, etc., are in English,
but the whole site is fun to look through, and you could use Google translate:
SC1E. German website, lots of interesting things....if you do not read German, put
the URL into Google Translations.
***NOTE! If you use Google CHROME browser, it has settings that will give you
SC1F. Source for Vintage sidecar items, numerous manufacturer's items here.
SC2. Sidecar Technical stuff. Links for manuals, mechanicals, photos, licensing.
Photos & modifications, subframes, mounts, EXTENSIVE info on alignment
considerations; specific details/photos of R100RT-Ural rig mounts, etc.
resources: INCLUDING setting up sidecars, how to
resources for handicapped sidecar & trikes, LOTS MORE includes
Speedometer re-calibrator, etc. rev: 10/14/2012
SC4. BMW frames;
subframes; installing subframes rev: 09/17/2012
Be sure to see #2 just above, for photos and technical details!!!
SC5B. Sidecar and sidecarist humor ...and some seriousness rev: 09/05/2014
SC6. Flying the chair; steering reversion; countersteering rev: 03/28/2014
Sidecar Tech, including FUEL TANKS, brakes, TIRES, etc.
SC8. EML sidecars: old brochure, plus LOTS of
technical information on weight,
dimensions, suspension & brakes overhaul; lamps, GT2; & other EML models,
tires, etc. SOME EZS information too. Allow time to load! rev. 09/06/2014
SC9. EML sidecar tops; photos; description of various types of tops; AND my own
custom top rev. 09/27/2012
Also see #8, just above
SC10. LEANER rigs. FLEXIT leaner sidecar; history, photos, etc. Other leaners;
conventional rigs also....hyperlinks, etc. rev. 01/19/2014
SC11. EZS_steering_dampener; including overhaul. Useful information for EML
owners too. rev: 02-18-2014
NOTE: See article 54-8A, way above, for a general article on steering
dampeners and shock absorber units
SC12. My first "street" sidecar, a R100RT-Ural sidecar rig, was sold April 2006.
Information & photos on that rig, including the subframes and a lot of other
technical items. rev. 10/13/2012
SC13. Tire article deleted on purpose (moved into article 7 just above)
SC14. If you are adding lamps, or changing lamps on a K-bike, etc. CLICK
MORE on Adding running lamp
function to turn signals, etc.
SC15. Lousy fuel mileage: see article 81
SC16. My present sidecar rig, see at the beginning of this sidecar section, and,
see: Our present Sidecar rig: K1100LT-EML-GT2
My K1100LT has handguards. See K bike section article 10 or click this line
NOTE: see article 82, well above; about insurance!
The technical information on this site is
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Last edit: Monday, September 22, 2014
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