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Messin' with the CDI...

Discussion in 'Maintenance' started by Joker, Apr 4, 2014.

  1. Joker

    Joker If you want me find Club250 on facebook. Premium Member Contributing Member

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    Sooo.... I may be a little mechanically oriented but electrically I am a total noob.

    The CDI I have for the Bandit 250 is some aftermarket LXO Lixiandra thing, it says its a bandit 250 GJ74A which is correct for the engine I have....(manufactured by shijiazhuang lixianda tech co ltd). I opened it up, a little bit of surface rust on a few terminals under the board but I cleaned that, and for the most part it looks pretty new.

    Anyhoo... referencing the following:

    1.JPG 2.JPG

    It says the red probe are the columns and the black probe is the rows, but when I do it that way I get no readings at all. The multimeter is set to 20k, the reference is "kilo ohms" surely I can't be THAT tired?

    However, if I make the columns the black and the rows the red, I start to get readings. That doesn't make sense to me because the thing shouldn't be a diode, it shouldn't matter which way the probes are the resistance should be the same in both directions?

    The other issue is, the readings are nothing like what the reference says they should be (generally). For example, the first two columns with readings are:

    one two
    five 12.93 12.87
    six 2.14 2.13
    seven 2.14 2.13

    'spose the row five ones are not too far off what they're supposed to be (11.5/11.5).

    Am I totally off track..??
     
  2. risky

    risky risky

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    sounds like a deristricted unit and not the original?
     
  3. Joker

    Joker If you want me find Club250 on facebook. Premium Member Contributing Member

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    Its definitely aftermarket, but I would have thought some of the resistances would correspond to the original. Or maybe I'm just wasting my time and it's fine. Nothing to benchmark it against though.
     
  4. risky

    risky risky

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    same supplier as my derestricted 2kr one.
     
  5. Joker

    Joker If you want me find Club250 on facebook. Premium Member Contributing Member

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    Do you know if there is a reference somewhere that I can test against?
     
  6. risky

    risky risky

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    nope. they are sold on alibababa.com.
     
  7. Joker

    Joker If you want me find Club250 on facebook. Premium Member Contributing Member

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    Oh well, suppose I should assume it's good then. Seems to be getting spark ok so...
     
  8. Bab

    Bab Well-Known Member

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    Hey Joker! I just have to respond to this as I went through the same procedures with the OEM module, and also with the new one I purchased from Lixanda. None of the readings made sense to me, and I also had spark immediately after plugging in the new one. For anyone following us, there could be a pattern showing...
     
  9. Joker

    Joker If you want me find Club250 on facebook. Premium Member Contributing Member

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    Well I know my bike ran, despite struggling with compression so it wasn't the CDI. I'm not sure why there are inaccuracies in the documentation vs what is measured, perhaps the aftermarket ones are set up different electronically.
     
  10. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Usually a 10% difference is acceptable, reading's can vary due to the temperature as well
     
  11. Cbuzz

    Cbuzz Well-Known Member Dirty Wheel Club

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    I used an Across Cdi in my Bandit 250 when I was troubleshooting & it worked perfectly.
     
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