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Thread: Duel plug VLD

  1. #1
    Join Date
    Feb 2017
    Location
    Parma Michigan
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    12

    Default Duel plug VLD

    Hello all. My name is Lee and I've been looking around the site for quite a while, became a member last year. I figured it was time to post something I've been putting my grandpas 34 VLD back together after being taken apart since sometime in the late 50's to early 60's. I got the engine mostly competed today and was curious if anybody has seen any heads like these before or has any info on them. I would like to thank everyone for such a great website loaded with knowledge.
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  2. #2
    Join Date
    Jul 2002
    Location
    North Hills, CA and Pine Grove, CA
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    So you also need dual coils.
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  3. #3
    Join Date
    Feb 2017
    Location
    Parma Michigan
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    Don't know if I'll run 2 coils or not, got a long ways to go until I get to that point. The story I was told was that you could switch the wire to the other plug when you were racing if you fouled out the first plug

  4. #4

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    I don't know anything about them but they look neat! Cheers

  5. #5
    Join Date
    Aug 2004
    Location
    Beautiful Northern New Mexico
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    Isn't that the same outfit that made the alloy ones? I believe they were out of Portland.
    Robbie Knight Amca #2736

  6. #6
    Join Date
    Jan 2003
    Location
    England
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    Yes, it looks like a steel version of the Smith 7-bolt alloy heads out of Portland Oregon, adapted for twin plugs. Alloy heads were tested in California in 1935 but never went into production, being superseded by 9 bolt iron heads the following year. I don't know if it was the Portland heads tested in 1935, or if these were later aftermarket items. I've not seen these iron 7-bolt two plug heads before, cool! Is there a compression code stamped underneath?

  7. #7
    Join Date
    Jul 2002
    Location
    North Hills, CA and Pine Grove, CA
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    Quote Originally Posted by Lee.c View Post
    Don't know if I'll run 2 coils or not, got a long ways to go until I get to that point. The story I was told was that you could switch the wire to the other plug when you were racing if you fouled out the first plug
    Seems like an unused plug would get a good layer of carbon on it.
    Be sure to visit;
    http://www.vintageamericanmotorcycles.com/main.php
    Be sure to register at the site so you can see large images.
    Also be sure to visit http://www.caimag.com/forum/

  8. #8
    Join Date
    Feb 2017
    Location
    Parma Michigan
    Posts
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    Thanks for all the replies! These have a a couple words before the raised Portland Or casting but sadly corrosion got the best of them and I can't make out what they are. After reading the replies Smith might be one of them. I couldn't find any stampings anywhere when I was cleaning them up. Here's a few more pictures if anybody wants to see them
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  9. #9
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    Feb 2017
    Location
    Parma Michigan
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    Quote Originally Posted by Chris Haynes View Post
    Seems like an unused plug would get a good layer of carbon on it.
    Same thought crossed my mind to, seems like if you fouled one the second one wouldn't light either

  10. #10
    Join Date
    Jan 2003
    Location
    England
    Posts
    1,097

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    Here's a picture of an aluminium head on my 35VLDD. Looks like this and the twin plug head came from the same or similar mould.
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