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Digital instruments for a P11

Discussion in 'Norton P11 Motorcycles' started by vercu, Oct 4, 2018.

  1. vercu

    vercu

    Joined:
    Dec 21, 2010
    Hi everyone,

    As I got a lot of tips and inspirations from this site in the past I want to

    share my story about installing electronic instruments and the speed sensor on my P11A.

    Don’t expect fancy machine work here . My skills and workshop equipment is limited.



    After living nearly 30 years with the mechanical Smiths instruments and their well known draw backs I wanted to try the digital ones this time.

    The goal is that the conversation should look as stock as possible.



    For the speed sensor I like the Comnoz solution. Because it gets rid of the dreaded tach drive internals. Unfortunately it was sold out.

    So I had to do it myself.

    The sensor is a Motogadget M5 reed switch with 2 magnets.

    An old defective tach drive was stripped and and the sensor installed.

    [​IMG]

    The cable runs inside an old tach drive cable which exits in the battery area.

    [​IMG]

    [​IMG]

    A magnet carrier was made and glued with RTV to the rear wheel.

    150 km later it is still in place.

    [​IMG]
     
    p400 likes this.
  2. vercu

    vercu

    Joined:
    Dec 21, 2010
    [​IMG]

    [​IMG]

    [​IMG]

    After a 3 months wait the instruments finally arrived from Caerbont.

    The speedo is a special with a 190 kmh dial.

    [​IMG]

    The wiring was a challenge but with the help of the Caerbont technical staff the instruments are now working.

    [​IMG]
     
    p400 likes this.
  3. vercu

    vercu

    Joined:
    Dec 21, 2010
    [​IMG]

    [​IMG]

    It is nice to read the correct speed on my 50 year old motorcycle.


    Peter
     
    jerrykap, lcrken and p400 like this.
  4. pierodn

    pierodn

    Joined:
    Nov 10, 2012
    Fantastic job, my compliments.
    Who supply this system?.
    Great.
    Piero
     
  5. vercu

    vercu

    Joined:
    Dec 21, 2010
  6. mdt-son

    mdt-son

    Joined:
    Jan 19, 2012
    Vercu, be careful not to expose the clocks to moisture as I understand they are leaking and really needs to be sealed. / Vorsicht bei Niederschlag, denn die Instrumente sind nicht wasserdicht.

    -Knut
     
  7. vercu

    vercu

    Joined:
    Dec 21, 2010
    Knut, I read that in the forums too.
    I hope Smiths have improved their design in the meantime.
    At least they advertise them with a new billet case and waterproof to IP67.
     
  8. pierodn

    pierodn

    Joined:
    Nov 10, 2012
    Hi Knut.
    They supply also the magnetic rotor?.
    Thanks.
    Piero
     
    Last edited: Oct 7, 2018
  9. vercu

    vercu

    Joined:
    Dec 21, 2010
    No they don't.
    It is my design and a friend did the machining.

    Note: Smiths Gauges USA sells a similar device.
    http://kullendesign.com/smithgaugewebsite/accessories/
    It is designed for the Commando which may work or may not work for the P11.
    The cable solution is different and it was not available some months ago.

    Peter
     
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