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Positive earth speed sensor?

Discussion in 'Norton Commando Motorcycles (Classic)' started by click, Jul 31, 2019.

  1. click

    click VIP MEMBER

    Joined:
    Dec 27, 2008
    Great info. thanks.

    What sensor are you using, is it the M8 reed-switch sender Puca supply?
     
  2. click

    click VIP MEMBER

    Joined:
    Dec 27, 2008
    Really appreciate the info. Would you mind if I send your picture to Matt so it’s clear what I’m looking for?

    P.S. I predict your bike will be a rusty heap in a few weeks without a coating of anti-rust oil, what are you thinking man, absolutely mad I tell you ....... :)
     
  3. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    Of course, send away!

    Matt will probably remember what he did for me anyway.

    Also, if you PM me your address, I’ll send you a magnet!
     
  4. baz

    baz VIP MEMBER

    Joined:
    May 26, 2010
    Sir
    As founder member of the smiths Speedo drive appreciation society
    I have to say this is just the sort of abuse we a trying to stop!!
    Also from a safety point of view there is no guard fitted!!!??
    A child or a small horse could be mangled by your drive unit
    Also you still haven't fitted your hub cover????
     
    Fast Eddie and jbruney like this.
  5. cliffa

    cliffa

    Joined:
    May 26, 2013
    I wonder if you could use the sensor from a cheap bicycle speedo? After all it’s only a reed relay closing when the magnet gets close enough. They have the added advantage of being sealed and normally have some method of mounting them included.


    Cheers,

    cliffa.
     
  6. gtiller

    gtiller VIP MEMBER

    Joined:
    Nov 5, 2012
    I think they stopped using reed relays years ago.

    The ‘new’ transducers are solid state and work by passing a continuous current through a small coil and measuring the fluctuation when a magnet passes by.

    They can react much faster than the reed switch type.


    I think they use both types on bicycle speedos - some you can hear click, which would indicate the old stool reed type.
     
  7. click

    click VIP MEMBER

    Joined:
    Dec 27, 2008
    That's very kind of you, I'm waiting to hear back from Matt, if I get the green light I'll be in touch!
     
  8. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    Slows it down too much....
     
  9. jbruney

    jbruney

    Joined:
    Jan 5, 2019
    I didn't mention the hub cover because I think it looks neat without one. Gives it a unique look.
     
  10. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    It’s best not to... surprising how many opinions it brings forth...!
     
  11. cNw

    cNw VIP MEMBER

    Joined:
    Apr 16, 2009
    Click,

    Not at the shop yet this morning. Another cup of coffee and I am on my way. Traffic may be heavy this morning as I have already seen three deer in the yard that will slow me down some (shops 200 feet from the house)

    Eddies set up won’t work as his is a pre Mk3. You don’t have the large reverse threaded nut on your Mk3. I can still get you the speedo blanking plate for the left side and a sensor holder for the right. The triggers for the sensor would be the studs or bolts securing your disc. Since Fast E. fit the sensor in his mount, we know that it will work on the Mk3 as well. You just have to reduce the hole size with a bush like he did.

    Matt
     
  12. click

    click VIP MEMBER

    Joined:
    Dec 27, 2008
    Hi Matt,

    Thanks for the reply.

    Ok, so if I use the sensor Fast Eddie used from Puca I’ll need to mount a magnet near the disc mounting bolts, as the Puca sensor needs a magnet to work, I think I have this correct?

    I’ll email you about the order + a few other bits I hope to get!

    Thanks for all the help & be careful out there, those deer can be quite sneaky :)
     
    Last edited: Aug 2, 2019
  13. jbruney

    jbruney

    Joined:
    Jan 5, 2019
    Just toss a couple of apple slices or cut up bananas ( no need to peel) and they won't mug you. Deer are nothing but 4 legged garbage cans that run very fast. They infest my sister's yard & await the food train.
    Don't mention Eddie's cover.
     
  14. jan nelder

    jan nelder

    Joined:
    Feb 18, 2018
    the sensor with the Smiths speedo I used just needs a lump of metal passing by for a trigger, and is insulated from the bike...just wires into speedo head. Easy calibration too, once wheel rolling radius and lumps per revolution established. (Deer in the yard... it’s what’s watching the deer that will slow you down... or speed you up!!)
     
  15. cliffa

    cliffa

    Joined:
    May 26, 2013
    Eddies cover ?
     
  16. click

    click VIP MEMBER

    Joined:
    Dec 27, 2008
    Interesting, we seem to have two types of sensors, one which requires a magnet like the one from Puca that Fast Eddie is using and the one you got from Smiths which needs something metal to pass in front of the sensor to trigger it.

    I'll get in touch with Smiths & see what sensor they supply, thanks for the info.
     
    Last edited: Aug 2, 2019
  17. Gadge

    Gadge VIP MEMBER

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    May 21, 2019
    You weren't supposed to mention it ;)
     
  18. cliffa

    cliffa

    Joined:
    May 26, 2013
    Ooooops. I think I got away with it though.
     
  19. Fast Eddie

    Fast Eddie VIP MEMBER

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    Oct 4, 2013
    No you didn’t ...
     
  20. click

    click VIP MEMBER

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    Dec 27, 2008
    project on hold while Matt checks out a new sensor, more anon
     

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