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P 11 ID numbers on motor

Discussion in 'Norton P11 Motorcycles' started by jeff Savage, Jan 8, 2020.

  1. jeff Savage

    jeff Savage

    Joined:
    Dec 18, 2019
    11/123001 are the numbers on the motor. Can anyone tell me the year made?
    Found my answer in another post. My 11/123001 if I am correct would be 11th from the last of the hi pipe models?
    Could anyone confirm or tell me if not.
    Thanks
     
    Last edited: Jan 8, 2020
  2. Junglebiker

    Junglebiker

    Joined:
    May 16, 2018
    That information is on the site if you search for it. I know that's not terrifically helpful, but honestly I can't remember where I found it when I went looking for it. I do remember that there is quite a bit of discussion on the subject and there seems to be some confusion out there regarding when exactly which numbers were made. Seems like a number of bikes that should theoretically be '68 models have '67 year model features. Or something like that.
     
  3. texasSlick

    texasSlick VIP MEMBER

    Joined:
    Jan 2, 2013
    Nortons were stamped with two digits to identify the Model, then with 6 digits to serialize the engine and frame.

    The number on the frame should match the engine number. On the frame, the Model number was stamped horizontally, and the 6 digits were vertical.

    I am not positively sure, but the number 11 indicates a P11.

    Somewhere there is a chart of codes and numbers grouped by year of mfg, but I am unable to find it. I am sure some one will chime in with that info.

    Slick
     
  4. mdt-son

    mdt-son

    Joined:
    Jan 19, 2012
    Hi Jeff,
    All P11 engines were stamped "P11 / 12xxxx" (starting at P11/121zzz and ending at P11/129zzz). Please note there were G15, Dominator (650/750) and early Commando models within this range.

    No, the "11" has nothing to do with the bike being a P11A featuring low-level headers.

    It seems you are missing a "P". Maybe it's been ground away, or your cases have been re-stamped. The font which was used for stamping at the factory is quite distinctive. You should look for other identity marks (or deviations of same) to confirm you have a genuine engine.

    -Knut
     
    Last edited: Jan 10, 2020

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