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Thread: Gasket Advice Needed

  1. #1
    Registered User
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    Gasket Advice Needed

    Finally have the 72’ R75/5 up and running but noticed a couple leaks on the right cylinder. The bike has been sitting in the garage a few weeks now and a small engine oil puddle is forming. It looks like the prior owner tried to patch the leak in the middle of the cylinder and the base. I planned to inspect the engine this weekend and will definitely need to replace the old gaskets. Is there a better option for gaskets for these old airheads than the factory ones? Also, do you use Yamabond or anything like that for the installation?

  2. #2
    Liaison 20774's Avatar
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    Use of OEM gaskets is best and yes, something like Yamabond is recommended. Brook covers all that on this page:

    https://brook.reams.me/bmw-motorcyle...ngine-top-end/
    Kurt -- Forum Liaison ---> 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
    Day Dreaming ... happy wanderer's Avatar
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    Having scraped off Yamabond and Hylomar off or old cylinder bases I highly recommend you use a newer product. I've used Permatex Ultra Gray on two top end rebuilds and removed one set that was sealed with Permatex Ultra Gray. It cleans up a lot easier and seals as well or better than the older sealants.

    This is definitely one area where new tech is worth considering. Or like the old Dow Corning ad used to say
    "Better living through chemistry!"
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  4. #4
    Quote Originally Posted by happy wanderer View Post
    Having scraped off Yamabond and Hylomar off or old cylinder bases I highly recommend you use a newer product. I've used Permatex Ultra Gray on two top end rebuilds and removed one set that was sealed with Permatex Ultra Gray. It cleans up a lot easier and seals as well or better than the older sealants.

    This is definitely one area where new tech is worth considering. Or like the old Dow Corning ad used to say
    "Better living through chemistry!"
    +1
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  5. #5
    '99 '03 '06 National Co-Rally Chair Friedle's Avatar
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    Quote Originally Posted by happy wanderer View Post

    This is definitely one area where new tech is worth considering. Or like the old Dow Corning ad used to say
    "Better living through chemistry!"
    Apparently you enjoyed their products more than you recall. Dow Corning makes glass products. Dow Chemicals made the good stuff !

    Friedle
    Ride fast safely

  6. #6
    Registered User GTRider's Avatar
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    https://www.grainger.com/product/DOW...Sealant-53DA85


    Not that you’d want to use it on a cylinder base, tho.


    Best,
    DG
    DGerber
    1983 R80ST — 1984 R80 G/S PD — 1993 R100GS — 2004 K1200GT w/Hannigan S/C — 2010 K1300GT
    BMWMOA#52184, AMA#271542, IBA#138

  7. #7
    Quote Originally Posted by Friedle View Post
    Apparently you enjoyed their products more than you recall. Dow Corning makes glass products. Dow Chemicals made the good stuff !

    Friedle
    They also make chemical stuff, such as a molybdenum disulfide (moly) gear oil additive.

    https://www.skygeek.com/dow-corning-...SABEgI_d_D_BwE
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  8. #8
    Day Dreaming ... happy wanderer's Avatar
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    Quote Originally Posted by Friedle View Post
    Apparently you enjoyed their products more than you recall. Dow Corning makes glass products. Dow Chemicals made the good stuff !

    Friedle
    HEY! I resemble that remark!
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  9. #9
    '99 '03 '06 National Co-Rally Chair Friedle's Avatar
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    Quote Originally Posted by PGlaves View Post
    They also make chemical stuff, such as a molybdenum disulfide (moly) gear oil additive.

    https://www.skygeek.com/dow-corning-...SABEgI_d_D_BwE
    Hello Paul, The phrase "better living through chemistry", at least in the late 60s in Boston. NEVER referred to molybdenum disulfide. Maybe in the mid-west, but NEVER in Boston. More likely talking about that fun guy professor at Harvard and that guy with the magic bus

    Friedle
    Ride fast safely

  10. #10
    To clarify, neither Dow Chemical nor Dow-Corning originated the phrase, "Better Living Through Chemistry. That was a trademarked slogan of Dupont starting in 1935.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

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