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Thread: Electrical question

  1. #1

    Electrical question

    The Lc4 now doesn't have spark (hooray)
    What is the best way of tracking down what's wrong, don't think it's the spark plug as I just changed it
    I have a multimeter but no idea how to use it to identify the problem.

    Ta,
    Lawson

  2. #2
    check all the things you changed recently! should be able to check battery voltage with the multimeter, track down a manual and it will tell you electrical troubleshooting and where to do it.
    thats all ive got mate. Dunno ktm
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  3. #3
    Quote Originally Posted by Negrogrande View Post
    The Lc4 now doesn't have spark (hooray)
    What is the best way of tracking down what's wrong, don't think it's the spark plug as I just changed it
    I have a multimeter but no idea how to use it to identify the problem.

    Ta,
    Lawson
    Remind me when I'm mobile again, and I come and have a look.


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  4. #4
    Admin Turbo's Avatar
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    Find the last/first thing that works in the circuit and trace it back from there.
    With any electrical problem it's basically start from the beginning - "Ok, I have voltage here... is it getting here tho..?"
    and so on, eliminating things until you find where it stops.
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  5. #5
    If you get stuck i have a number of a bike sparky who is quite reasonable...
    The bullshitstops when the clutch drops

  6. #6
    misguided youth Little Mick's Avatar
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    Quote Originally Posted by Sicko View Post
    Find the last/first thing that works in the circuit and trace it back from there.
    With any electrical problem it's basically start from the beginning - "Ok, I have voltage here... is it getting here tho..?"
    and so on, eliminating things until you find where it stops.
    This
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  7. #7
    Thanks guys, I will try and troubleshoot it.
    Lights and fan work so I will try for some garage time tonight.
    Gracias

  8. #8
    Quote Originally Posted by Lets Torque View Post
    If you get stuck i have a number of a bike sparky who is quite reasonable...
    Stuck...

    on closer inspection the wiring is a bit of a birds nest, someone has bodged the headlight up at some point in the past.

    the headlight is now not working but the flash button does? I hate electrics.

    rebuilding the gearbox on my aprilia was easier than this

  9. #9
    misguided youth Little Mick's Avatar
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    do you have a wiring diagram Andrew?
    Life's too Short- YOLO!

  10. #10
    misguided youth Little Mick's Avatar
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    ignition circuit is separate from the rest of the electrical system so should be easier to isolate.
    Life's too Short- YOLO!

  11. #11
    It's definitely lead or CDI related, I'm getting less than a volt a the lead
    I've eliminated the kill switch as the problem but that's about it

  12. #12
    Senior Member Marty's Avatar
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    These bikes are notorious for having CDI issues

  13. #13
    Quote Originally Posted by Marty View Post
    These bikes are notorious for having CDI issues
    awesome, so far it has sat in my mum's garage with my motivation to fix it at an all time low...

    I've ordered a new one and might be bothered trying to fit next weekend

  14. #14
    did you try my sparky?
    The bullshitstops when the clutch drops

  15. #15
    not in the end, it was too far to travel for me. I had one of my mates drop round who is good with electrics take a look CDI was roted

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