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Thread: Any known ignition switch issues on 80's R80?

  1. #16
    Day Dreaming ... happy wanderer's Avatar
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    Not to hijack the thread since my beancan(s) on my 81 R80G/S and 82 R100RS are not misfiring or cutting out but the RS does have an issue with the idle hanging up at high RPM once the engine is fully warmed up. I have read here and elsewhere this is probably due to a sticky advance mechanism in the bean can. I suppose I should confirm this with a timing light but then again, a very high idle is going to show timing advance no matter what is causing it.

    I've read here about maintaining the bean can but I'm assuming this means disassembly. There is a couple of great links in Kurt's sig on how to do this although what lubricant to use, how and how much seems to be up for discussion.

    I've also read it's possible to lube the advance unit via the little opening cover on the side.

    So what do you guys recommend I do? And yes, I'm a tad reluctant to tear the thing apart but then again, I do have a spare one to practice on. I'm not sure it was re-assembled properly by the PO though. I bought is as a spare.
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  2. #17
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    Quote Originally Posted by lkchris View Post
    It's all inside the bean can and not subject to the wiring degradation of the Oilheads. The years are for sure getting on, but I never gave this system a 2nd thought in the 30 years I've dealt with them.
    I have had 3 of these fail over the years

  3. #18
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    Quote Originally Posted by happy wanderer View Post
    Not to hijack the thread since my beancan(s) on my 81 R80G/S and 82 R100RS are not misfiring or cutting out but the RS does have an issue with the idle hanging up at high RPM once the engine is fully warmed up. I have read here and elsewhere this is probably due to a sticky advance mechanism in the bean can. I suppose I should confirm this with a timing light but then again, a very high idle is going to show timing advance no matter what is causing it.

    I've read here about maintaining the bean can but I'm assuming this means disassembly. There is a couple of great links in Kurt's sig on how to do this although what lubricant to use, how and how much seems to be up for discussion.

    I've also read it's possible to lube the advance unit via the little opening cover on the side.

    So what do you guys recommend I do? And yes, I'm a tad reluctant to tear the thing apart but then again, I do have a spare one to practice on. I'm not sure it was re-assembled properly by the PO though. I bought is as a spare.
    Take the little plate off the side, spray in some electric contact cleaner, slosh and dump, let it dry, then light silicone spray

  4. #19
    Day Dreaming ... happy wanderer's Avatar
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    Quote Originally Posted by jforgo View Post
    Take the little plate off the side, spray in some electric contact cleaner, slosh and dump, let it dry, then light silicone spray
    Thanks. I'll give that a whirl.
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  5. #20
    Administrator 20774's Avatar
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    If the self repair doesn't work, Snowbum has a list of a few people who overhaul ignition canisters...down towards the bottom of this page:

    http://bmwmotorcycletech.info/Ignition.htm
    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!

  6. #21
    . AntonLargiader's Avatar
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    I have replaced a switch or two on that era bike (which is something I almost never have to do in general).
    Anton Largiader 72724
    largiader.com bmwra.org

  7. #22
    Day Dreaming ... happy wanderer's Avatar
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    Thanks Kurt and Anton. Given the cost of these things new and BMW's no parts policy on that ignition switch it's a good thing we can dive into them ourselves and effect basic repairs and maintenance. Some very good disassembly write ups in Kurt's resources list.

    I'm pretty confident my issue is most likely one of lack of lubrication so it should be easy enough to fix it up. An Airhead riding buddy over on Vancouver Island has a red smoke '82 RS almost identical to mine and interestingly his ignition trigger just failed last month. He sent it to the fellow in Colorado listed on Snobum's site with excellent results. Always good to have a backup plan.

    The weather turned beautiful up here over the weekend so I've been out riding it. Riding up past Whistler and up into the mountains at the end of October is a rare opportunity not to be missed.
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  8. #23
    Phil B bullfrog_28560's Avatar
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    I located a distributor close to me for once and cheap, http://www.hallsensors.de/Hall-Vane.htm looks like itll be a winter project to replace the sensor, if I break something, ill have a new GS to ride anyway. Ill get the bean can from motoelectric with the new control module for 350.00.
    Phil Bouffard
    SSG U.S. Army
    Kaiserslautern, Germany

  9. #24
    Phil B bullfrog_28560's Avatar
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    Part Arrived

    found a source for the Hall effect sensor, funny thing is, since I have ordered the part, the bike has not cut off. I plan on replacing the part when I am done riding for the winter, currently is raining a lot, but still riding. Snow or ice will officially end my riding here in Germany till March/April[ATTACH]42274
    Attached Images Attached Images
    Phil Bouffard
    SSG U.S. Army
    Kaiserslautern, Germany

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