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  #1  
Old 27th May 2007
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alainmengoli alainmengoli is offline
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Default Please someone explain this new databus wiring

So I am trying to use an universal spedo tacho on my bike but have problems with the data-bus system. I understand that the single databus wire (light green violet) controls the speedo, tacho and indicators. What I need to know is how to use the wire to feed conventional speedos, tacho and how to make th eindicators work now.
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Old 27th May 2007
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Default not a mech but

as far as I can tell you want to use a analog device with a digital system. why?
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Old 27th May 2007
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  #4  
Old 27th May 2007
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I have a universal speed/tacho which is small and will do everything I want it to do.
http://www.acewell-meter.com/c0_1.php?bid=11&pid=3
besides th eoptimistic tacho and fuell gauge the unit fits nicly whiere my mirror used to.

If you look at the specs it sayd tacho has coil feed or CDI not sure what that means.
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Old 27th May 2007
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Quote:
Originally Posted by alainmengoli View Post
I have a universal speed/tacho which is small and will do everything I want it to do.
http://www.acewell-meter.com/c0_1.php?bid=11&pid=3
besides th eoptimistic tacho and fuell gauge the unit fits nicly whiere my mirror used to.

If you look at the specs it sayd tacho has coil feed or CDI not sure what that means.
except work on a digital system
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Old 27th May 2007
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Is there no way I can make it work??
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Old 27th May 2007
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Default ok ill try to reak this down

a data or multi-plex buss uses low voltage coded electrical signals to send data in digital form. in other words thie is high and low or on and off. The analog device you have measures raw physical (real) things like vibration and rpm. if you are real real smart you can designe a device with a computer languge that can translate the digtal data into an analog signal. I suspecct the reverse of the divice already exists that allows digital devices to be used on old bikes but the reverse is less likely since the digital stuff is more acurate any way
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Old 27th May 2007
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ok thanks now how do I fix my indicators? can I use a standard jap type switch i.e. single switch which moves side to side?
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Old 31st May 2007
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HI again,

I wanted to know if it is possible to tap into the signal wire to the coils for a tachometer and the feed from the gearboc for the speedometer hence bypassing the data bus system? I see three wire to the coils and two sensor on the gearbox, I reckon one is for neutral and the other for speed sensor.
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Old 2nd June 2007
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It is possible. While the data running from the ICM to the stock gauges is serial over a single wire, the sensor(s) that the ICM is listening to is analog. That means you still can get a tach signal from the coil, and get speed data directly from the speed sensor. This is how Dakota Digital gets their stuff to work on serial (04 and up) bikes.
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