Anyone know what this is?

Discussion in '2 smokers' started by Bendernz, Feb 13, 2013.

  1. Bendernz

    Bendernz Torrential

    Joined:
    Aug 26, 2009
    Oddometer:
    567
    Location:
    Auckland, New Zealand
    At the annual classic racing festival here in NZ and this was on display. It's what we'd call a bitza - bitza this and bitza that.

    The guys who found it, literally, in a barn, want to know what the engine is and so far no-one has been able to tell them. Any clues from the knowledgeable on here would be appreciated.

    It runs, by the way.

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    #1
  2. lamotovita

    lamotovita Ageing Adventurer

    Joined:
    Oct 5, 2007
    Oddometer:
    1,640
    Location:
    WA/AZ, USA
    I wish I could help. Are there valve springs in the combustion chamber? I don't think it's a two stroke, is it?
    #2
  3. dnrobertson

    dnrobertson Big Bike, Slow Rider

    Joined:
    Jun 30, 2008
    Oddometer:
    851
    Location:
    Frankston, Australia
    #3
  4. ken_the_carp

    ken_the_carp Adventurer

    Joined:
    Jan 27, 2006
    Oddometer:
    77
    Location:
    Montreal Quebec
    Definitely a 4stroke, both the cylinder and head are cast as single unit. The pine cone plugs allow you to drop valves in. I'd say late 1920s ajs, matchless..
    Ken
    #4
  5. lamotovita

    lamotovita Ageing Adventurer

    Joined:
    Oct 5, 2007
    Oddometer:
    1,640
    Location:
    WA/AZ, USA
    Why are the plugs so tall?
    #5
  6. Bendernz

    Bendernz Torrential

    Joined:
    Aug 26, 2009
    Oddometer:
    567
    Location:
    Auckland, New Zealand
    Oops, it's a four stroke so shouldn't be in this section.

    However, led by sound information from Mr Gatorjane it appears to be a 1928 Enfield 350 side valve.

    And it still runs.

    Fantastic.
    #6
  7. ken_the_carp

    ken_the_carp Adventurer

    Joined:
    Jan 27, 2006
    Oddometer:
    77
    Location:
    Montreal Quebec
    I assume the "fins" help to cool the valve area. I'm currently working on a 32 Matchless, same set-up, top end is is one casting with the tall alloy plugs.
    There is something amazing about an 85 year old bike that's still a daily rider. Yes this in the wrong thread.
    Ken
    #7