ultimate wiring diagram

Discussion in '2 Stroke Bicycle Engines & Kits' started by gubba, May 10, 2011.

  1. gubba

    gubba New Member

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    this diagram was provided by rawmotors.com - homepage left hand collumn.
    they also have an excellent tutorial all about clutches.

    in the mag, the black wire is screwed into the mag frame and is thereby ground

    the 2 killswitch wires COULD be ANY 2 colors. i have seen the yellow wire shown have a thin red verticle stripe or a red wire with a thin yellow stripe.
    i had one build with a lavender wire and a red wire COMMING OUT OF THE MAG. lol ----inside the mag the colors were correct but they had pigtailed the other 2 colors..... you just had to apply the lavender into the black set the red into blue set. love those chineese.
    note the white wire is capped off and not used.

    ************** sorry, i cant get the pic size down to 19kb
    go to the website to view it


    stay dry
    gubba
     
  2. DuctTapedGoat

    DuctTapedGoat Active Member

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    There is a LOT of topics out there on proper wiring.

    A huge symptom of following the china girl kit motor instruction manuals is that of putting the white wire in circuit. Though it can work - a common symptom is that the magneto will drain it's juice into the spark and just give you a low idle when you hit the kill switch instead of actually grounding it out.

    The most important thing to remember is to fold back or cap off your white wire unless you plan to adventure in accessory lighting (in which case, keep your wire cap handy for when you're done with the multimeter and you just want to ride).

    Basically, all you have to do is match your CDI wires up to the engine wires. If only one matches - match that, and assume the others match (not white, leaves one). Your kill switch can go anywhere (except white), as that just redirects everything into the ground (frame). Don't worry which wires from the kill switch you're using, as they're just two wires with a push button switch in between.

    If you don't have a good ground, you can run into issues down the road, so always check for oxidation, especially after winter and rainy seasons.
     
  3. 2door

    2door Moderator
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    Instead of relying on an external ground wire, just wire the kill switch to the blue and black from the mag to CDI. The black wire is a ground, attached to the magneto coil. This way you don't have to worry about scraping off paint or being concerned with rust or dirt at your ground connection. There is really no reason to have an extra ground. One is already provided for you via the black wire. The bike frame plays no role in the engine's ignition system.
    Tom
     
  4. DuctTapedGoat

    DuctTapedGoat Active Member

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    Just got done dropping in a new CDI - wired it up with the kill switch between the leads off the CDI and mag. Works great, and the new CDI is kickin pretty well too.
     
  5. gubba

    gubba New Member

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    each of you are absolutly correct.
    its the nubies mainly that say "my friend said to use the white wire".
    a nice diagram is very helpful for them to actually see it.
    i just cut mine short.

    stay dry
    gubba
     
  6. 2door

    2door Moderator
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    This diagram is an old standard that has been around here for quite a while.
    It has helped quite a few newbies.
    Tom
     

    Attached Files:

  7. rohmell

    rohmell Active Member

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    Since we all agree that the white wire plays no part in the ignition wiring, why have a diagram that shows its use as 'optional'?
    Remove any mention of the white wire as being a possible candidate for use with the ignition system.
    Ignition Electrical Diagram.jpg
    Ignition Electrical Diagram alt color .jpg
     
  8. dan+1

    dan+1 New Member

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    some really cool stuff, instructions wish i got some with my kit. lol. Thanks guys you have all helped with this forum
     
  9. 2door

    2door Moderator
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    Because in spite of the evidence to the contrary there are still those out there who maintain that the white wire to ground is the way to kill the engine. The diagram gives the newbie the option of doing it either way. Just covering all the bases, Rohmell.
    Offering both methods mollifies the opposing faction.
    Tom
     
  10. gubba

    gubba New Member

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    it does not say 'optional'!
    it says 'cap and wrap'!

    i know many use the white included...... and i have replaced tons of them, fried.


    gubba
     
  11. rohmell

    rohmell Active Member

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    Here's another wiring diagram:
    NEW ingintion Diagram.jpg
     
  12. georgek512

    georgek512 New Member

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    how do you tell if your cdi doesnt work?
     
  13. biknut

    biknut Active Member

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    The easiest way is to substitute a new one.
     
  14. 2door

    2door Moderator
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    Totally agree. The chances of getting two bad CDIs are so high as to be a non issue. Yes there are ways to check the ignition module but just swapping it out with a new one is the quickest and most sure fire way to tell if that is your problem. Having and carrying a spare is cheap insurance.
    Tom
     

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