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Replace speedo

Discussion in 'Griso-Bella Chat & Tech' started by Evans Mott, Sep 13, 2020.

  1. Evans Mott

    Evans Mott Just got it firing!

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    Location:
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    I'm building a custom long distance tourer based on a 1200 8v 2007 Griso
    I want to ditch the original speedo and simplify the systems as far as possible.
    Is there anyone who can advise as to how to duplicate the inputs from the speedo circuit board
    to the ECU
    4 - IMGP7084.png
     
    groundhog105 likes this.
  2. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    Hi Evans, the 1200-8V model didn't officially happen until 2009, so if the picture you posted is your bike, check the production date on the steering head to verify. Not sure on what you're trying to do with the stock speedo as to a replacement or ?
     
  3. Evans Mott

    Evans Mott Just got it firing!

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    The bike was imported from Japan (to New Zealand) it is definitely a 1200 8V model, 2007 is what it says on the papers but ...
    I bought the Griso because I find the lines of the bike unique, my customization has been to enhance the look.
    I've created a new instrument panel with a cleaner look and provision for a navigation device.
    For simplicity of maintenance and to allow for the customization I would prefer that the ECU only governs engine management.
    Realizing that the circuit board in the original speedo is linked to the ECU, my preference would be to simulate the signals from the speedo so that I can do without it.
    Thanks Evans

    IMGP2440-Recovered 1.png
     
  4. john zibell

    john zibell Moderator Staff Member GT di Razza Pura

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    Before you go off on customization, has the engine been converted to roller lifters? If not that would be a more pressing issue.
     
    BrianR likes this.
  5. Evans Mott

    Evans Mott Just got it firing!

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    Yes done that. That's how I know it's the 1200 8v motor
    Thanks
     
  6. Brian UK

    Brian UK GT Reference

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    I know someone in the UK replaced the dash with a speedo running off the speed sensor. Bike worked perfectly well, but of course didn't have the benefit of the anti theft immobiliser as that is controlled from the dash. Similarly indicators would need a different control.

    You also, of course, lose the ability to check fault codes and reset them from the dash.
     
    Last edited: Sep 14, 2020
  7. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    If your new speedo will accept pulse values @.5v, you can wire the speedo sensor directly in, or add a magnetic pick up. As long as your bike starts and runs without the dash, Bob's your Uncle. ;)
     
  8. Evans Mott

    Evans Mott Just got it firing!

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    As far as I can tell there needs to be a signal from the immobilzer to the ECU for it to function, there are also sensors in the speedo housing
    that's why I think I'll need to simulate those signals to ditch the original speedo.
    The original speedo to my mind lets down the look of the Griso, which apart from making room for a navigation device is why I made
    the new panel.
    The left hand switch assembly I also found wanting, having the horn button more accessible than the indicator switch
    isn't good.
    I also like to control my lights from that switch, off for starting, high intensity led parker for daytime riding.
    I've replaced the stock switch assembly with one that I set up to suit my riding.
    It has a small led that indicates that the light circuits are on which I really like.
    The new Traitech speedo / rev counter, etc has it's own speed sensor that I've installed on the front wheel.
    Thanks for all your input. If anyone has contact details for someone who has successfully done without the original speedo would be a great help. Thanks Evans

    IMGP2300.JPG
     
  9. Brian UK

    Brian UK GT Reference

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    Someone here in the UK tried just that, and with the dash disconnected, the engine started. Means it's a pretty useless immobiliser of course.
     
  10. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    I have. We're building #11 as we write; https://gtmotocycles.com/pages/builds-collection
    I've had many start and run fine with the dashboard unplugged. You have an issue?
    Email me for more info (only); Info at GuzziTech.com
     
  11. Evans Mott

    Evans Mott Just got it firing!

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    I haven't tried starting the bike since the electrical changes for fear of wrecking the ECU.
    Every company I've emailed has replied that there are necessary sensors in the speedo circuit board.
    The immobilizer and bank angle switch are two of the unnecessary systems I want to get rid of.
    I've a marine circuit breaker locked under the seat that isolates the electrics.
    The bike was black and silver when I bought it. I carbon fibre wrapped the exposed frame rail and other details thenpainted the bike a contrasting colour. The result is what I was hoping for. Thanks Evans

    22 - IMGP7165+.png
     
  12. BrianR

    BrianR Tuned and Synch'ed

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    I have great admiration for your veracity and fortitude in doing things to your bike that I would never even think of attempting. It may well be a tourer, but with the original tank volume it can never be considered a long distance one at about 200 kms a tankful. Do you have any planned changes to increase tank capacity?
     
  13. Evans Mott

    Evans Mott Just got it firing!

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    For touring I have a set of luggage. I'll carry a container of petrol to extend the range when necessary.
    Fortunately it's viable to know where to get fuel when planning a trip these days.
    I fabricated a rack that when removed leaves no frames etc hanging off the bike.
    The only reason I specifically chose the Griso is for the lines and the look, to me a timeless classic.

    IMGP2483.png
     

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