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Project R90S Rolling chassis. Dual discs, head light. Guages., ears stocks , Lester wheels, fenders, 33/11 final drive, Trans with kicker, seat with cowl grab rail. 1977 R100/7 Engine and carbs. Lots of stuff. About $10k CDN. If sold separate. In Elora, Ontario , Canada. 1 519 827 8467. Thanks Warren Seaton

Pretty cool engine model https://www.amazon.com/BMW-Airhead-Engine-Collectors-Manual/dp/B07LDC9MJW Mac Kirkpatrick Glenmoore, PA "After all, what is adventure, but inconvenience, properly regarded?" C. Donahue

Stock 75 R90S SS. Looks like I am going to need a pair of shocks. Friends have suggested YSS, Hagon, Ikon. This is a nice daily rider, close but not a show bike. Would like good performance and possibly the option to install the stock shock cover to present the illusion of stock. I find multiple options in those brands online. Wanting some specific suggestions/model numbers based on experience. THANKS!!!!!!

See https://www.ebay.com/itm/283959646271?ssPageName=STRK%3AMEBIDX%3AIT&fromMakeTrack=true Mac Kirkpatrick Glenmoore, PA "After all, what is adventure, but inconvenience, properly regarded?" C. Donahue

Hi Martin, I have a brand new set of Konis in the box that I set aside and was saving for another future restoration, but that is not going to happen. They have real polished aluminum R90S "shrouds" fitted, so they look just like the originals. I am no techie so will try and send a picture separately. They are perfect and beautiful. $300 + shipping. I am in eastern PA. Mac Kirkpatrick Glenmoore, PA "After all, what is adventure, but inconvenience, properly regarded?" C. Donahue On Sat, Jul 25, 2020 at 8:49 AM Martin Johnson <Dermodad@...> wrote: Stock 75 R90S SS. Looks like I am going to need a pair of shocks. Friends have suggested YSS, Hagon, Ikon. This is a nice daily rider, close but not a show bike. Would like good performance and possibly the option to install the stock shock cover to present the illusion of stock. I find multiple options in those brands online. Wanting some specific suggestions/model numbers based on experience. THANKS!!!!!!

Dear Group, Are there any quirks in regard to removing and reinstalling a fuel petcock on a ’75 S that I should know about? Should threads be addressed? i.e. plumbers tape, etc. Thanks for any help. G.Murphy Mequon, Wi.

Replacement /5 handlebar switches are now available, which means if you own a '74 R90S, R90/6, etc., your bike has the /5 switches and you will want to know the following since the '74 bikes have different wiring, they have a 5 position ignition switch versus '75 on 3 position ignition switches, etc. This from Vech @ Bench Mark Works http://www.benchmarkworks.com I was the one that first contacted the manufacturer, and sent samples of the original switches, and I insisted that the manufacturer modify them with screw terminals on the back of the switch (rather than hard soldered harnesses) so the harnesses can be replaced as they fall apart in the sun. This was my idea, but I do not have an exclusive contract, so others now offer the switches. However, the people I contacted to make the switches, insisted on providing harnesses with each switch. There is a problem with that. I argued against it, but they would not listen. The problem is, 1974 only /6 uses a different harness and has flag terminals on the end that goes in the H/L bucket. The /5 version had simple tinned ends on the wires, to connect with the terminal board and flasher socket. Plus, the LHS /6 has extra wires for the clutch interlock feature that the /5 version does not. And, the 1974 only R90s had an identical harness, but of different length. That is why I sell the same switches, without harnesses, and I offer the harnesses separate. The Harnesses for the /5 are: 61 31 1 351 219H--$35.50--RHS indicator switch harness /5 61 31 1 351 220H--$35.50--LHS indicator switch harness /5 But the harnesses for the 1974 /6 bikes are: 61 31 1 357 521H--$35.00--RHS indicator switch harness /6 1974 only 61 31 1 357 521HS--$35.00--RHS indicator switch harness R90S 1974 only 61 31 1 357 523H--$35.00--LHS switch harness /6 1974 only 61 31 1 357 523HS--$35.00--LHS switch harness R90S 1974 only And the original headlight bucket grommet that was originally made up on the harness of /6 switches, was not removable (due to the combination of flag terminals and the fact that the wires were hard soldered into the original switches). that grommet was not available separately, back in the day. I have a substitute that fits and works. And it is possible to install it because the end of the harness at the switch is not hard soldered to the switch. 61 31 1 357 521G--$1.00--Grommet for /6 bucket 1974 harness Mac Kirkpatrick Glenmoore, PA "After all, what is adventure, but inconvenience, properly regarded?" C. Donahue

Would someone please pass Vech's information, below to the /5 list so they know the true story and don't order the wrong parts? If you want the correct repro handlebar switches for your bike, see Vech's complete statement below. *** How about NOT posting purposely misleading and incorrect information to the airhead list? The most made-up/implied portion of the story from yesterday is as follows; the email from yesterday had additional incomplete information that was posted above this statement: "These /5 switches are now available from The Beemer Shop and it's many dealers including Motorrad Elektrik, Euro Moto Electrics, Bob’s BMW plus others. The Beemer Shop welcomes dealer inquiries." The above is BS, many others sell these parts, The Beemer Shop does not control the supply of these parts as is explicitly implied by the sender. IMO this reflects badly on Ted's shop and he does not deserve that. Following is the true, complete story from Vech at Bench Mark Works, read it if you have the models Vech references or you could buy the wrong parts for your bike and who needs to go through that? **** From Vech: These are the same switches that I am selling. I was the one that first contacted the manufacturer, and sent samples of the original switches, and I insisted that the manufacture modify them with screw terminals on the back of the switch (rather than hard soldered harnesses) so the harnesses can be replaced as they fall apart in the sun. This was my idea, but I do not have an exclusive contract, so others now offer the switches. However, the people I contacted to make the switches, insisted on providing harnesses with each switch. There is a problem with that. I argued against it, but they would not listen. The problem is, 1974 only /6 uses a different harness and has flag terminals on the end that goes in the H/L bucket. The /5 version had simple tinned ends on the wires, to connect with the terminal board and flasher socket. Plus, the LHS /6 has extra wires for the clutch interlock feature that the /5 version does not. And, the 1974 only R90s had an identical harness, but of different length. That is why I sell the same switches, without harnesses, and I offer the harnesses separate. The Harnesses for the /5 are: 61 31 1 351 219H--$35.50--RHS indicator switch harness /5 61 31 1 351 220H--$35.50--LHS indicator switch harness /5 But the harnesses for the 1974 /6 bikes are: 61 31 1 357 521H--$35.00--RHS indicator switch harness /6 1974 only 61 31 1 357 521HS--$35.00--RHS indicator switch harness R90S 1974 only 61 31 1 357 523H--$35.00--LHS switch harness /6 1974 only 61 31 1 357 523HS--$35.00--LHS switch harness R90S 1974 only And the original headlight bucket grommet that was originally made up on the harness of /6 switches, was not removable (due to the combination of flag terminals and the fact that the wires were hard soldered into the original switches). that grommet was not available separately, back in the day. I have a substitute that fits and works. And it is possible to install it because the end of the harness at the switch is not hard soldered to the switch. 61 31 1 357 521G--$1.00--Grommet for /6 bucket 1974 harness *** Mac Kirkpatrick Glenmoore, PA "After all, what is adventure, but inconvenience, properly regarded?" C. Donahue

See below, R90S for sale. Mac Kirkpatrick Glenmoore, PA "After all, what is adventure, but inconvenience, properly regarded?" C. Donahue ---------- Forwarded message --------- From: Larry Mansfield via PAAirheads <paairheads@...> Date: Sun, Jul 19, 2020 at 9:53 AM Subject: R90S project bike For Sale To: PA Airheads Group <paairheads@...> 74 R90S that is 90% done. Needs DelOrto work and possible rear thrust ring replacement. Non matching numbers bike that was a high mileage bike before work started. Original matching block included. Bike repainted in Daytona Orange, non-original for a 74. Details and pics available for interested person(s). If interested should contact me via phone to get the complete scoop on the bike. Moving on to other projects and could use extra cash for those projects. larry m Delta, PA 410.218.1725

I've been experimenting with using a cast-off android cellphone with no internet connection as a navigation device. I've been using the OSMand software and downloaded via my home network the four local states I'm liable to be riding in the near future. It works surprising well. I see some small 12V to 5V transformers on Amazon. I was wondering if I hit the "RESV" terminals and one of the Brown terminals on the circuit board, and drilled and grommetted a small hole in the headlight shell to pass a wire thru to charge my cellphone. Have any of you done something similar or see a downside to this scheme?

Hey group, I wanted to share this information with you all. The odometer on my “ 75 S “ stopped turning recently. (59.588 miles) Tachometer needle had been getting a bit jumpy too. These gauges had never been serviced. I took them to Speedometer Service Company, www.speedometersolutions.com in Milwaukee, phone 414-463-6660 ( 6.5 mi. From my home.) This is the “old school” type of shop that we all miss so much. Mom and Pop shop. Roger, the owner is third generation. Family owned and operated since 1932. A true time capsule. I dropped the gauges off at 10:00 a.m Tuesday morning. I got a call back from Roger, the next day at 11:00 a.m. Gauges are done and ready to go. I couldn’t believe the short turn around time. The speedometer, odometer and tach have never been as smooth. Like brand new. While he was at it he calibrated the speedometer. Said it was reading 8-10 miles per hour Fast. I knew these speedo’s had that tendency but not that much. Friend of mine is a retired director of R&D for Harley Davidson and he told me Harley used this company for issues that would come up from time to time. I strongly recommend this company. Roger knows his stuff and is fair priced. $270 for the service. Hope this helps someone. Happy Trails. Gayle Murphy In sunny Milwaukee, by the big pond.

I've heard the exact same thing Tito, from many sources. And that the Quandt family still owns a great deal of BMW and they are very wealthy. Mac Kirkpatrick Glenmoore, PA "After all, what is adventure, but inconvenience, properly regarded?" C. Donahue

For anyone who owns an older BMW car, here is a very well done video from the BMW Car Club of America you can send around that is a history of BMW and of course includes some very nice motorcycles: https://bmwccafoundation.org/genesis-virtual-tour/ The BMW Car Club car also has motorcycles on display. https://www.bmwcca.org Mac Kirkpatrick Glenmoore, PA "After all, what is adventure, but inconvenience, properly regarded?" C. Donahue

More re new cylinders: One option to achieve Nikasil/nickel silicon carbide cylinders if your pistons are good, is to send the pistons and cylinders to PowerSeal USA http://www.powersealusa.com where they will bore out the cylinders, coat them with Nikasil, then re-bore them to fit your pistons. Their website is an informative read. And this process is most often less expensive than purchasing new parts. Mac Kirkpatrick Glenmoore, PA "After all, what is adventure, but inconvenience, properly regarded?" C. Donahue