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Thread: Clutch release lever oil leakage

  1. #1
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    Clutch release lever oil leakage

    I have a 1984 R80RT and noticed a few drips of transmission oil at the clutch release lever boot, at the back of the transmission. Looking at parts fiche, I can't find a seal in the lever assembly, nor on the transmission shaft at the rear. Is it "normal" for a bit of oil to seep into the release lever assembly? If not, where is the seal? Thanks!

  2. #2
    Administrator 20774's Avatar
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    Not normal for this to leak. IIRC, the '80s bikes had a slightly different arrangement...you need the rubber boot or cup and clamp...see Items 5 and 6:

    http://www.realoem.com/bmw/showparts...86&hg=21&fg=51

    Maybe the clamp just needs tightening?
    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!

  3. #3
    Jack Ethridge
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    I have an 83 R100RT and thought i had a leaking seal at the clutch rod so i replaced the seal. That didn't solve the problem. the oil was coming from the crank case vent and running down. I split the vent with a T and two small hoses and vented the vent into each carb. Solved the leak

    Jack Ethridge
    Ocala Fl.

  4. #4
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    After disassembly of the actuator, I see that there is a small hole in the cup/boot. The clamp may have been a bit loose, but I think the cup/boot is the problem. We'll see. Once that is repaired, I'll let you know if any more problems arise. Thanks so much to you both.

  5. #5
    Administrator 20774's Avatar
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    For now, can you rotate the boot 180 degrees so the hole/crack is on top?
    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. #6
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    Yes. Matter of fact, I repaired the two small holes with what I consider a very good flexible sealant. It is Suzuki 1207B silicone gasket, in a tube. It is used in the reassembly of crankcase halves, etc. It seems to be very flexible, but tenacious stuff. So after cleaning the cup/boot thoroughly, I have applied the sealant and will allow it dry overnight before assembly. In the meantime, I have cleaned up that area of the bike, as well as greased up the thrust bearing and the needle bearing in the release arm. This leak may have been a blessing in disguise, as the release arm bearing was pretty seized up with gunk and the rollers were not turning too easily. So, a thorough cleaning and regreasing of that bearing and pivot.

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