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Thread: Baby bosch racing magneto for harley or Indian?

  1. #1
    Join Date
    Jul 2011
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    South Australia, Australia
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    Default Baby bosch racing magneto for harley or Indian?

    Hi everyone,

    I'm not sure if i am posting this in the correct place but I just picked up this baby bosch magneto and was wondering if anyone can tell me if it is either for a Harley or Indian or could it possibly not be a racing magneto?

    Thanks,

    James

    IMAG3502.jpgIMAG3503.jpgIMAG3504.jpgIMAG3505.jpgIMAG3506.jpg

  2. #2
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    Jan 2007
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    Corvallis, Oregon USA
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    Bill Gilbert in Oregon

  3. #3
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    Dec 2001
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    42 degree is Indian, 45 degree is H-D
    DrSprocket

  4. #4
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    Jul 2012
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    Quote Originally Posted by 26harleyj View Post
    if anyone can tell me if it is either for a Harley or Indian
    Many, but not all, Bosch magnetos have the firing angle they left the factory with stamped on them. But, I can't see it in any of your pictures and, in any case, that was ~100 years ago so the cam easily could have been changed since then. Unfortunately, it isn't possible to distinguish a 42-deg. cam from a 45-deg by naked eye.

  5. #5
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    Thank you for the replies. I did look all over the mag and could not find the firing angle stamped into the body of the magneto. If i put a degree wheel on the nose of the drive shaft of the magneto, can i determine if it is a 42-deg or a 45-deg?

    23JDCA 808---Those links were quite helpful thanks but still seems undetermined if this is a racing magneto or not?


    Thanks,


    James

  6. #6
    Join Date
    Dec 2006
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    1,287

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    i see this style on beemers. the harley and indian ff magnetos have 2 magnets not one large magnet. they also lack the plastic retaining strap by the wires. this dose not mean it wont work for you. it's just a few years newer. the ff mags make a little hotter spark then the zevs. i have no clue if it is better to have 1 magnet or 2.

  7. #7

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    The FFV "baby Bosch" units were standard equipment on 1927-1929 Harley mag model big twins. All of mine have one magnet.
    Mark Masa

  8. #8
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    Mark, thank you for the clarification for the correct application of this magneto.

    Thanks,

    James

  9. #9
    Join Date
    Jul 2012
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    Quote Originally Posted by 26harleyj View Post
    If i put a degree wheel on the nose of the drive shaft of the magneto, can i determine if it is a 42-deg or a 45-deg?
    If you go to the following link you will find my discussion (under the screen name Magnetoman) of measuring the cam to determine the angle between the lobes:

    http://www.britbike.com/forums/ubbth...849#Post459849

    When you click on the above it initially will go to the first page of the thread so just sit on you hands for 5 sec. or so until it jumps to the correct post.

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