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Thread: Loss of power 100s

  1. #16
    Old Salt MEAirhd's Avatar
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    I had a condenser "POOCH" a few day's ago with about 1500mi of duty. Similar problems, could not figure out the root of the problem till my mechanic narrowed it down. I should have left the old one in there. Do we really know where these parts are made today?? I don't remember having to change condenser's but every few years.
    Last edited by MEAirhd; 07-10-2013 at 10:16 AM.

  2. #17
    R100GS, '89 Guenther's Avatar
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    If it is a 100 with emission stuff it does vent from underneath the seal lip of the tank cap via a solenoid into the air filter housing.

    Is that what you had in mind, bikerfish?

    /Guenther

  3. #18
    Administrator 20774's Avatar
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    Bike in question is a 1978 model:

    http://www.bmwmoa.org/forum/showthre...l=1#post887391
    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!

  4. #19
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    [QUOTE=jimmylee;887803]I didn't get, but are you still running points and condenser or electronic.

    What you are describing sound eerily similar (if I remember that far back) to what my /2 did. Turned out to be condenser.

    Ran fine until it started cutting out, plug wires tested bad are coming from BMW, condenser, points are being changed also. The wires are shot condenser & points may be at fault also so.

    I was interested in a pre can ignition bike chance I took seller had basically not done anything! Go figure.
    Just trying to git it home so I can go through it all.

    Thanks for the input, thoughts!
    I believe this is a pre emission stuff 78s has only a single vent to r side carb, if that is correct?

  5. #20
    Administrator 20774's Avatar
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    Quote Originally Posted by seaswood View Post
    I believe this is a pre emission stuff 78s has only a single vent to r side carb, if that is correct?
    Yes it is a single vent from the breather to the right carb. The '78s (most of them anyway) are subject to EPA (aka emissions) constraints but maybe not in the way you're suggesting. No fuel vent lines or solenoids, no external pipes back to the heads, etc. The timing on the '78s were set back in order to make them run a bit leaner...it got worse over time.
    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
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    S

    Would the Smodel had a oil cooler? & a S fairing?
    I know the RS had a oil cooler, did the S?

    Has the frame for it to fit

  7. #22
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    Quote Originally Posted by seaswood View Post
    Would the Smodel had a oil cooler? & a S fairing?
    I know the RS had a oil cooler, did the S?

    Has the frame for it to fit
    Only a few RS's came with oil coolers in '78, & none of the S models to my knowledge. Could have been added by dealer, but not too likely.
    why do you ask?
    Ride Safe, Ride Lots

  8. #23
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    Quote Originally Posted by bikerfish1100 View Post
    Only a few RS's came with oil coolers in '78, & none of the S models to my knowledge. Could have been added by dealer, but not too likely.
    why do you ask?
    Just curious as where what was original to this bike, thanks.

  9. #24
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    Quote Originally Posted by seaswood View Post
    Just curious as where what was original to this bike, thanks.
    http://www.omnilex.com/public/bmw78/
    Ride Safe, Ride Lots

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