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Thread: Replacement clamps for exhaust nuts on 1986 R80RT

  1. #1
    Registered User PeoriaMac's Avatar
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    Replacement clamps for exhaust nuts on 1986 R80RT

    Anyone out there ever use the V-2 Airhead Exhaust Clamp mounts made in Germany and sold by Nick's BMW?
    I have a badly bunged right exhaust thread on my '86 R80. James A. (Woodensteel) spent about two hours today with tiny files trying to bring it back to a semblence of stock, but it may not be possible. He's willing to try, and I only had to feed him and ply him with lunch to get him to return, but it may be hopeless...and I'm looking for a plan B.

    Here's what I'm talking about http://www.nicksbmw.com/nuts.html
    Mac
    1986 R80RT, 2005 R1200GS
    Livin' Large On The Lake

  2. #2
    Registered User kentuvman's Avatar
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    Was in a similar situation with my R65LS - I looked at what you're looking at and decided I prefer the OEM look. There are some shops that will fabricate new threads on your cylinder head - if you need a resource send me a PM.

    In my case, I found a used head on ebay motors in good shape - my machinist did a minor valve job & cleaned it up - it's worked out great.
    Ken Tuvman
    Excelsior, MN
    K75s, R65LS, R60/5

  3. #3
    Registered User PeoriaMac's Avatar
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    Quote Originally Posted by kentuvman View Post
    Was in a similar situation with my R65LS - I looked at what you're looking at and decided I prefer the OEM look. There are some shops that will fabricate new threads on your cylinder head - if you need a resource send me a PM.

    In my case, I found a used head on ebay motors in good shape - my machinist did a minor valve job & cleaned it up - it's worked out great.
    As it turns out, plan A worked. That would be James A working for about two hours with tiny files creating good threads where bad ones
    previous lurked. Result was today we buttoned the bike back up and took it for a ride. Now it's for sale....
    Mac
    1986 R80RT, 2005 R1200GS
    Livin' Large On The Lake

  4. #4
    Registered User lmo1131's Avatar
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    Since Mr A won't be included in the sale make sure you include a thread file in the tool kit...

    "It is what you discover, after you know it all, that counts." _ John Wooden

    Lew Morris
    1973 R75/5 - original owner

  5. #5
    Registered User PeoriaMac's Avatar
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    [QUOTE= Since Mr A won't be included in the sale make sure you include a thread file in the tool kit...

    Hmmm, perhaps. I will be more open to any buyer about the need to keep anti-sieze on the exhaust threads. Good thing I checked...otherwise
    some new owner would be on this forum taking my name in vain. I ALMOST don't want to sell it, but I can't keep in James' garage and
    pretend I sold it. Or can I?
    Mac
    1986 R80RT, 2005 R1200GS
    Livin' Large On The Lake

  6. #6
    advrider.com
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    I haven't seen him in a while, but I will always consider Mr. James A. S. my airhead mentor and life-long friend. What a resource he is! A respectable dude with a plethora of knowledge and passion about our beloved airheads.. much more so than the better-known names in the field.

  7. #7
    Registered User 88bmwjeff's Avatar
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    Thread file

    A thread file is a must in these situations. I buggered up a few threads on my right head. A thread file worked great to restore the threads to a usable condition.

    Here's a quick search of thread files:

    http://www.amazon.com/s/?ie=UTF8&key...l_82aakary1x_e
    Jeff in W.C.
    1988 R100 RT (the other woman)
    "I got my motorcycle jacket but I'm walking all the time." Joe Strummer

  8. #8
    James.A
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    Quote Originally Posted by 88bmwjeff View Post
    A thread file is a must in these situations. I buggered up a few threads on my right head. A thread file worked great to restore the threads to a usable condition.

    Here's a quick search of thread files:
    Jeff, I did not know there was such a thing as a thread file. In this case, I dressed the threads free-hand using a set called "needle files" of various profiles. The true challenge was getting the take-up groove started. I cut a slight bevel around the perimeter of the outlet and drug the micro-file counter clockwise thru what was left of the thread valley until it met the bevel. Then working clockwise around the outlet to clean up the bottoms of the grooves. There was evidence to suggest that someone in the ownership history knew that this was going on.

    C D D: thanks for the kind words, my friend. I'm sure we will cross paths again.

    Mac: You wanna place to hide a bike?... I can find a place to hide a bike..... gimme a couple of days.

    Lew: While I can't be bought, I can be had.....

  9. #9
    Registered User lmo1131's Avatar
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    I know the feeling James, I've been had more than few times myself ....

    My /5s right cylinder exhaust threads are nearing their useful life; they might last another year or so; it's not like you loosen the nut that frequently. In the past when I have had the headers off I always make a few light passes with a thread file to kind of clean things up a bit; it does a great job of cleaning harden anti-seize, dirt, etc. out of the grooves.

    Might as well buy an SAE file when you pick up the metric one.

    The true challenge was getting the take-up groove started.
    Easy work with a thread file ... you start from the "back" (near the head), or anywhere you can find a bit of remaining good thread, and work your way to the end. The last bit is done on the "backstroke". A cool tool Jule.
    "It is what you discover, after you know it all, that counts." _ John Wooden

    Lew Morris
    1973 R75/5 - original owner

  10. #10
    Registered User 88bmwjeff's Avatar
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    Quote Originally Posted by lmo1131 View Post
    In the past when I have had the headers off I always make a few light passes with a thread file to kind of clean things up a bit; it does a great job of cleaning harden anti-seize, dirt, etc. out of the grooves.
    I've found that WD40 and the exhaust nut work very well to clean the threads up. I spray a liberal amount of WD40 on the threads and move the nut back and forth. After about a half dozen passes, I remove the nut and wipe dry. Just put something on ground to catch the mixture of WD40 and anti-seize paste.
    Jeff in W.C.
    1988 R100 RT (the other woman)
    "I got my motorcycle jacket but I'm walking all the time." Joe Strummer

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