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Digital speedo question

Discussion in 'XJ Modifications' started by wwj750, Aug 27, 2012.

  1. wwj750

    wwj750 Member

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    Ive been seeing guys around here that have installed digital speedos from Koso, Vapor, ect. Can somebody tell me how these work, how they install, & how accurate they are? Thanks-ride safe, all.
     
  2. MN-Maxims

    MN-Maxims St. Paul Minnesota

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    There is a company called Western Digital that can take your stock housing and install all the Digital information you want. Not sure on cost but might be worth looking into for a custom job.
     
  3. hotsummer

    hotsummer Member

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    Thanks.
     
  4. darkfibre

    darkfibre Member

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    The Koso speedo is very accurate as you can dial in any wheel diameter, once I set it up correctly it agrees with my GPS for both speed and distance.
     
  5. wwj750

    wwj750 Member

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    Thanks for the responses. What I'm looking for is whats involved in the installation of these digital speedos? Is there a sensor that mounts on the wheel, ect.? Or do they utilize the mechanical cable or ??
     
  6. Polock

    Polock Well-Known Member

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    some use a mechanical cable i think
     

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  7. darkfibre

    darkfibre Member

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    The Koso came with a magnet set up, but I bought the optional adapter that fitted into the original speedo drive on the wheel.
     
  8. broberg

    broberg Member

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  9. wwj750

    wwj750 Member

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    Hey guys, many thanks for taking the time to post the info & pics. Can anyone comment about the Vapor unit? This is the one I'm leaning toward. Does this one use the magnet-type setup as well? They sure are slick lookin units.
     
  10. Polock

    Polock Well-Known Member

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    i think mine is a copy of the vapor unit guts, they seemed to do the same things. i was going to get a vapor but found the acewell on sale.
    pretty sure you can download the papers for the vapor units at the trail tech website. i never considered anything but a magnet so don't know about cable drives. depending on the settings the acewell would work on a 1 cyl two stroke too. mine was really for a cr450 honda
     
  11. wwj750

    wwj750 Member

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    Good idea-I'll go check out the websites. I was looking for some firsthand experience, sounds like you're pretty happy with your setup. I think theres a lot of guys here going this route.
     
  12. GBruns

    GBruns New Member

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    I've got an Acewell 2853. It's pretty easy to install, although I wouldn't call it a breeze. I had some issues with reverse polarity of the LED on the oil light that required the use of a relay to correct. Not so great instructions either. Very nice unit though! You usually need to get a bit creative in figuring out how to mount the speed sensor. As far as accuracy. It's up to you to make it accurate as it's all driven off the wheel diameter information which you enter in the unit. The tach info is either derived by wrapping a wire around the coil or connecting to the negative coil terminal where the signal from the electronic ignition connects. Getting a steady read on the rpm signal may be easy or it may take some work, sometimes requiring the use of an inline resistor.

    Regardless, go for it!
     

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