Cdi yellow wire
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Thread: Cdi yellow wire

  1. #1
    Junior Member GrantM's Avatar
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    Hello:

    I ordered and received a cdi for my 1995 tw from partzilla. I seem to have an extra yellow wire. I taped over the end of the yellow wire, held my breath and 260$ cdi but the bike fired up and ran nicely. All the symptoms of idling fine but an inability to rev up appear to be gone.

    Does anyone have any concerns leaving that wire disconnected? I guess the damage would have been done by now?

    Thanks for any comments.

    Grant

  2. #2
    Senior Member FortPayne's Avatar
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    Wait for someone with it fresher on their mind can chime in but NO its not fine. I had wires connected wrong and went over 2,000 before the cdi went taking my stator with it. Very expensive lesson. Don't run that baby til you figure out where it goes.
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  3. #3
    Senior Member operose's Avatar
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    Don't cut the yellow wire!!!



    Well, you won't blow up but can't remember what it does. Better safe than kicked off the bomb squad the hard way. Will look it up for you in morning if someone else doesn't chime in
    ITCB

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  5. #4
    Senior Member elime's Avatar
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    My parts bike came with a spare CDI. The PO said he spent $300 and it didn't run any better with the new one -- it was a carb problem. I noticed the extra wire and decided to use the older CDI with the correct number of wires and after reading this post I am glad I did. I was thinking maybe the yellow wire went to a tach.







    It seems like all things TW start with a "2JX", at least on my '87's. If so maybe "2YG" is significant for some other model that is useable with the TW.



    Long live the internal combustion engine!

  6. #5
    Junior Member GrantM's Avatar
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    Thanks a lot to all who replied. I am trying to find a good wiring diagram but no luck yet. A sketchy one shows what looks like the yellow wire going to a neutral switch.

    Thanks again.

    Grant

  7. #6
    Senior Member FortPayne's Avatar
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    2yg is my '94 so I assume '88-'00.
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  8. #7
    Senior Member FortPayne's Avatar
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    OK here we go. Assuming you have the correct model stator and cdi, the yellow and brown wires go to your stator. They come from the stator and attach to the wiring harness under the seat. It keeps the colors and attaches to your cdi out of another point on your wiring harness. Shouldn't run without it actually. I ran mine with the yellow and brown wires reversed for 2k before utter destruction.







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  9. #8
    Senior Member elime's Avatar
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    So what I need is a wiring diagram for an '87.....................or what years have a yellow wire and which years don't?
    Long live the internal combustion engine!

  10. #9
    Junior Member GrantM's Avatar
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    Thanks for the diagram. I am going to end up with the extra yellow wire I guess since all the other colours matched up nicely....A bit of history... I only had the bike home for a few hours before the idling and rev problem showed up. I isolated it to the cdi after several carb cleans. I noticed the problem went away when moving the bike from a warm to cooler place. II baked the cdi in the oven and could get a ride or two out of it but I never ventured too far. This new one seems to work great but I hope I don't have a 2000 km disaster.

    Thanks again

    Grant

  11. #10
    Senior Member FortPayne's Avatar
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    Quote Originally Posted by Tony View Post
    So what I need is a wiring diagram for an '87.....................or what years have a yellow wire and which years don't?


    Those came right out of the manual downloaded from this site. The first wiring diagram in the manual is for an '87. The pics I posted are from the end of the manual for later model bikes. It's all pretty sketchy at best but through personal experience I know this is the one to use on my '94.



    P.S.- Still don't think there should be any extra wires much less a yellow one but if it works then good luck to ya!
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