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Thread: How to check your electrical system

  1. #1
    Join Date
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    Thumbs up How to check your electrical system

    This is for everyone trying to figure out there electrical problems, like no lights, or no spark.

    enjoy


    you need to check all the electrical with a digital or analog meter,

    check the coil, standard : 0.1-0.3 ohm
    (test where the wires connect to the coil)

    secondary coil, standard: 7-11 K ohm
    (test where one wire connects to the coil and the other end by the spark plug cap)

    If the secondary coil test is out of spec then take the cap off and measure the secondary directly where the cap screws in
    the resistance should be in thisspec, Standard: 3-5 K ohm

    check the stator, Standard : 50-250 ohm
    (86-88 disconnect the black/red wire check the resistance from the blak/red wire to the ground)
    (89 disconnect 2piece connector and check the resistance to the ground)

    check the pulse generator, Standard: 50-200 ohm
    (disconnect the pulse gen and check the resistance with the blue/yellow and green/white)

    check the AC regulator, Standard: 86, 13.0-15.0 volts@ 5000 rpm
    87-89, 12.0-14.0 volts@ 3000 rpm
    (start the motor and hook up a tach, measure volts between the white/yellow and green wires at the wire harness side of the connector, if this reading isnt in spec check the alternator lighting coil, if the coil is ok, replace the regulator)

    check the alternator lighting coil, Standard: 0.1-1.0 ohm
    (86-88 disconnect the white/yellow wire from the stator
    89 disconnect 2piece connector, check resistance between white/yellow and ground)

    Replace any of these components if they do not measure in specifications
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  2. #2
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    Beerock gave the measurement points for the coil primary side and secondary side. All other measurements should be to a solid chassis ground, like an engine mount bolt, or a bare spot on the frame.
    Duncan Racing 340PV, +2 A-arms, +4 LSR axle, and a host of other goodies.

  3. #3
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    beerock is bustin out the good threads tonight!!! everyone that has been sticky'd is definitely where it needs to be, at the top.
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  4. #4
    Join Date
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    Originally posted by dober250R
    beerock is bustin out the good threads tonight!!! everyone that has been sticky'd is definitely where it needs to be, at the top.
    theres probably gonna be 12 diffrent stickies, glad to see someone finally stepping up so the same questions wont get asked weekly

  5. #5
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    not 20, then there wont be nothig for us to answer.
    Atv Riders Photo Journalist and Atv riders atv specialist
    Ride:
    Laeger flip top protrax, Axis LT Shocks, Dominator +4 race axle , BWR 330 motor,Keihn 39mm pwk, 178 main, 52 pilot, DGH needle middle clip, Curtis Sparks TT Pipe& Silencer,CFM aluminum airbox, K&N Filter, 98 CR250 Boysen Rad Valve (rad 02b) W/spacer plate,Ricky Stator 200watt,Ricky Stator Rectifier, Ricky Stator Lightened Flywheel,Ricky Stator Billet Lights 200watt, Amsoil Dominator and C12 @ 50:1
    soon to have a B+B 320cc ktm rod stroker.

    ad me on facebook


    BWR part out all parts for sale!

    http://www.exriders.com/vbb/showthre...0&pagenumber=4

  6. #6
    Join Date
    May 2002
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    Originally posted by wilkin250r
    Beerock gave the measurement points for the coil primary side and secondary side. All other measurements should be to a solid chassis ground, like an engine mount bolt, or a bare spot on the frame.
    id like to see you do a thread to teach folks how to properly use a multimeter!
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  7. #7
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    Good stuff beerock

  8. #8
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    Originally posted by Pappy
    id like to see you do a thread to teach folks how to properly use a multimeter!
    I can do two, I suppose. A thread and a tech article. I'll get on it.
    Duncan Racing 340PV, +2 A-arms, +4 LSR axle, and a host of other goodies.

  9. #9
    Join Date
    May 2006
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    Thanks beercock

    I could have saved myself time money and trouble had i known what beercock just posted. However does anyone know the specs for a cdi box???

  10. #10
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    You can't test the CDI box with an ordinary multimeter. The function of a CDI box changes with varying input voltage, timing, and frequency. You can't reproduce those signals with an ordinary multimeter.

    The method for testing a CDI is rather simple. Test everything else, if they all check out OK, then by process of elimination, the problem must be the CDI.
    Duncan Racing 340PV, +2 A-arms, +4 LSR axle, and a host of other goodies.

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