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Thread: Pretending to know what I am doing - 1947 FL

  1. #71
    Join Date
    Dec 2014
    Posts
    19

    Default

    If you got factory neck cups, Paul at ACF showed me how he regrinds 'em. All four pieces cost $180. These OEM units are hardened way deeper than I ever woulda guessed.





    One more problem solved...

  2. #72
    Join Date
    Apr 2008
    Location
    Upper Yarra Valley, Victoria. Australia
    Posts
    811

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    Excellent pictures and discussion.
    The neck races in my 37 had some light pocketing so I brazed a ball bearing to some stock, fitted the races in the lathe and lapped them with coarse lapping paste, and finished off with fine paste. From memory, it wasn't a super quick job, but was completely effective. I thought about using one of those stones in your picture, but didn't know how to form the correct radius on the end.
    Enjoying your thread.
    Steve Little
    Upper Yarra Valley. Victoria.
    Australia.
    AMCA member 1950

  3. #73
    Join Date
    Dec 2014
    Posts
    19

    Default

    Quote Originally Posted by Steve Little View Post
    Excellent pictures and discussion.
    The neck races in my 37 had some light pocketing so I brazed a ball bearing to some stock, fitted the races in the lathe and lapped them with coarse lapping paste, and finished off with fine paste. From memory, it wasn't a super quick job, but was completely effective. I thought about using one of those stones in your picture, but didn't know how to form the correct radius on the end.
    Enjoying your thread.
    I think the stone sort of deforms to the existing curvature, but Paul shapes his with a diamond-tipped dressing tool. In either event, I doubt it matters if you're off even by a whole bunch... it's hardly like this is a high-speed application. I just needed the deep notches out. I expect I'll be dead the next time they need to be replaced.

    I like that lapping idea, too. May have to steal that for next time.

  4. #74
    Join Date
    Dec 2014
    Posts
    19

    Default

    #nervousshits



    Mike saved the castings for reuse...


  5. #75
    Join Date
    Mar 2009
    Posts
    519

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    Nothing to be nervous about. Looking good!
    (I'm another interested follower.)

  6. #76
    Join Date
    Dec 2014
    Posts
    19

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    Quote Originally Posted by Rooster View Post
    Nothing to be nervous about. Looking good!
    (I'm another interested follower.)
    You're right, of course. Still gives me heart-attack pangs.

  7. #77
    Join Date
    Jan 2010
    Location
    in someone's crosshairs
    Posts
    198

    Default

    I love seeing this kind of work done. People really show off their talent and creativity when restoring these old motorcycles.

  8. #78
    Join Date
    Dec 2014
    Posts
    19

    Default

    Mike is busy...




  9. #79
    Join Date
    Dec 2014
    Posts
    19

    Default

    Hey, check it out, this thing works now.

    https://drive.google.com/open?id=0B-...zYxcVB6aEU2cm8

  10. #80
    Join Date
    Dec 2014
    Posts
    19

    Default



    Getting closer...

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