Hand of Doom!

Discussion in 'Airheads' started by Carl, Jul 6, 2012.

  1. Carl

    Carl ,,,

    Joined:
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    Sometime during the life of these parts someone's (not mine!) hands doomed them to scrap, or made a design disaster.


    These parts were from a poorly stored BMW R50/2 engine:
    [​IMG]
    [​IMG]

    This adapter was made by a father-son machinist team. It was used to adapt two different tapers from an early (1955-60) crankshaft to use a later (1961-69) year BMW generator armature:
    [​IMG]
    [​IMG]

    Why not to over rev the early engine cylinder design on the BMW R69 & R69S models:
    [​IMG]
    [​IMG]

    The aftermath on BMW R69US engine pushrods when 'racing' a HD Panhead:
    [​IMG]

    <iframe width="560" height="315" src="http://www.youtube.com/embed/KsK630FuTxk" frameborder="0" allowfullscreen></iframe>
    #1
  2. Bill Harris

    Bill Harris Confirmed Curmudgeon

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    Ah, so it was you who ended up buying this eBay wonder:

    [​IMG]

    You did talk him down to $1400, didn't ya?

    :lol3:rofl:lol3
    #2
  3. wirewrkr

    wirewrkr the thread-killer

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    Carl,did you mean to say early crank with a late armature?
    #3
  4. disston

    disston ShadeTreeExpert

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    So, who won?
    #4
  5. Bill Harris

    Bill Harris Confirmed Curmudgeon

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    And I think he shoulda said "father-son blacksmithery team"... :D
    #5
  6. Carl

    Carl ,,,

    Joined:
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    To give credit where credit is due, the father-son machinist team cranked out some fine work. The adapter just happened to be one of those items that wasn't in their fine work category.

    Carl
    #6
  7. Carl

    Carl ,,,

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    Alcohol was involved. It was a blurry finish for them, and not me.

    I did get the opportunity to repair the R69US engine. Two pushrods and gaskets had the bike back rolling along. The bike now resides in storage in a northern Ohio basement.

    Carl
    #7
  8. Bill Harris

    Bill Harris Confirmed Curmudgeon

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    And no disrespect intended. In this CNC age a hand-tapped sheet metal adapter is a work of art.
    #8
  9. Carl

    Carl ,,,

    Joined:
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    South Tejas
    The aftermath on a BMW R69S engine case when a rider decides to race a Vincent. The BMW rider 'thought' installing a 20207 barrel bearing front and rear on the crankshaft would help 'achieve' greater RPM for racing!

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
    #9