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  1. #1

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    No Spark..Tested Stator/CDI, Now what?

    Alright guys, I've got a no spark condition on my 1992 SL650. It ran fine last month, then it sat (w/ battery connected) for a few weeks when I was out of town. I came back and tried to start, no luck. I checked for spark and it would be there once every 10 tries, but was short and very very weak. So I bought a brand new battery and got it nice and charged since I knew that could cause major headaches when chasing electrical gremlins. So here are my findings from ohm testing the CDI/stator:

    Red/Purple to Yellow = .6
    Red/Purple to Black = Open
    Yellow to Black = Open
    White/Yellow to Black = 220
    Blue/Red to Red/White = 90
    Red/White to Black = 90 (***This should be zero according to guide?)
    Red/White to Green/Red = 490

    Black Battery Lead to Black Stator Wire = 0
    Black Ignition from CDI to Engine Ground = 0

    Black Coil to Black/White Coil = .6 (typical at each)
    Black Coil to Black White Coil across all in series = 1.2
    Black Coil to Secondary = 3,300 (typical at each)
    Plug Boots = 4,800 to 5,200

    So everything seems to test out except for the Red/White to Black wire on the stator harness? I didn't see in any of the guides what the heck this means ?? Anyone? Hope my stator isn't shot, I don't feel up to that challenge .

    Thanks ahead of time for the help guys! Thanks to beerdart for the help with the service manual earlier today!

    -Trey


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Try using the search feature.

    Most suggestions should be in the threads.

    http://www.greenhulk.net/forums/show...ight=spark+750

  3. #3
    Ride a day, wrech a week!
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    does the manual say what the red/white wire is?
    odds are if it testing above the noted resistance it could be the problem.

  4. #4

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    I tried the search feature and couldn't find a conclusive answer to my exact situation. No one seems to know what the red/white wire is for?

    The wiring diagram shows the red/white wire going to a stator coil, which it also seems that the blue/red wire connects to the red/white wire AND the adjacent stator coil. Also, I looked back at the services manual and it doesn't say to test the red/white wire to black, this thread ( http://www.greenhulk.net/forums/showthread.php?t=98103 ). Also, this connection isn't supposed to ohm out at 0 it is supposed to be open/infinite according to the thread.

    What does this mean electrical gurus? Has the red/white wire shorted to ground and somehow killed my stator?

    -Trey

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Treys92 View Post
    ...no spark condition on my 1992 SL650
    ... ohm testing the CDI/stator:

    Red/Purple to Yellow = .6
    Red/Purple to Black = Open
    Yellow to Black = Open
    White/Yellow to Black = 220
    Blue/Red to Red/White = 90
    Red/White to Black = 90 (***This should be zero according to guide?)
    Red/White to Green/Red = 490

    Black Battery Lead to Black Stator Wire = 0
    Black Ignition from CDI to Engine Ground = 0

    Black Coil to Black/White Coil = .6 (typical at each)
    Black Coil to Black White Coil across all in series = 1.2
    Black Coil to Secondary = 3,300 (typical at each)
    Plug Boots = 4,800 to 5,200

    So everything seems to test out except for the Red/White to Black wire on the stator harness? I didn't see in any of the guides what the heck this means...
    Quote Originally Posted by k447
    ...Magneto stator coils
    Red/Purple to Yellow: 0.6 ohms (Alternator coil - battery charging)
    Red/Purple or Yellow to Black: Infinite/open/no connection
    White/Yellow to Black: 220 ohms (Trigger coil)
    Blue/Red to Red/White: 90 ohms (Pulser coil)
    Red/White to Black: Infinite/open/no connection
    Red/White to Green/Red: 490 ohms (Exciter coil)...
    If your readings are accurate, you have a partial short between the Red/White and ground, which should not be connected at all.

    Check Blue/Red to Black/ground. Should also be open circuit, but I suspect it may be shorted to ground.

  6. #6
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Your stator is fine according to my servive manual.

    I'm VERY surprised that your stator measures EXACTLY what the manual specs. I have quite a few Fuji stators, and am lucky to have 1 or 2 meausrments match the book precisely. But yours matching every one is incredible.

    Try disconnecting the kill switch, and see if that helps. (choke the engine out to kill it)

    Try cutting your plug wires back 1/4" and rescrew the boots back on.

    Double check that engine grounds are clean and tight.

    Also make sure the lanyard is installed.

    Look for signs of wear or insulation cut along the wire harness.

  7. #7
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    I just checked an extra stator I have, and found no measurable resistance to blk from r/w, g/w or bl/w. I never checked those to blk before, as the manual didn't instruct to test them.

  8. #8

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    Well, spent all day building a retaining wall isntead of playing on the river. Oh well, such is life.

    Checked out the blue/red to ground and sure enough, it reads 100 ohms. Looks like those two are shorted to ground for one reason or another. So having blue/red and red/white shorted to ground is stopping me from getting spark? Anyone ever had or heard of this problem before? Now I wonder WHERE they have shorted to ground....hopefully not on a melted stator coil? Could it be a junk CDI?

    Xlint - there are a couple of the larger numbers that I rounded 1 to 2 ohms, but other than that, they are dead on the service manual specs...scary for a 92 isn't it? It seems that my multi-meter is "smart" so I shouldn't have to do the adjustment factor, correct?

  9. #9
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Treys92 View Post
    ... Checked out the blue/red to ground and sure enough, it reads 100 ohms. Looks like those two are shorted to ground for one reason or another.

    So having blue/red and red/white shorted to ground is stopping me from getting spark? Anyone ever had or heard of this problem before?

    Now I wonder WHERE they have shorted to ground....hopefully not on a melted stator coil? Could it be a junk CDI?...
    When you are ohm testing the stator, you have all the stator wires disconnected from the CDI and terminal board - correct?

  10. #10
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    What's your location?

    Maybe another member can try your CDI or offer you a replacement for testing purposes that lives nearby?

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