No Spark...Wiring CDI/Mag/Kill Switch Mess

[MrLarkins]

my cdi (I assume that's the little black box) has one black and one blue...and I connected that black to the motor black and that blue to the motor blue...my kill switch has a black and a red and I grounded the black to the frame and connected the red to the white. and my bike went 300 miles with a working kill switch

now, did this 'fry' my mag or cdi?

[Jakylpops]

I'm not sure, but it is a possibility. That's why I never recommend doing the "white wire kill switch" method.
When you interrupt the CDI circuit with the normal kill switch setup, you are completely rerouting all electricity away from the CDI into the bike frame, so there is no more spark for the engine.
On the other hand, when you stop the engine by shorting out the white wire, the CDI circuit is still in contact and trying to fire the engine, but there is a second circuit formed by the white wire that is now drawing so much electricity that the engine stops running because the CDI cannot draw ENOUGH current to keep firing. I'm not sure exactly how delicate the CDI and magneto are, but I DO know that low voltage is almost as bad for electronic components as too much.

[MrLarkins]

soo...how should it be wired?

I have a black and red from my kill switch.
I have a black , blue, and white from my motor.
I have a black and blue from my CDI.

Do I do the following?
{black kill switch wire to bicycle frame}
{red kill switch to blue motor}
{black CDI to black motor}
{blue CDI to blue motor}
?
?
that puts the red kill switch and blue CDI BOTH to blue motor...is that right? and the white wire dangles to nothing?
{re

[Pablo]

Originally Posted by MrLarkins

my cdi (I assume that's the little black box) has one black and one blue...and I connected that black to the motor black and that blue to the motor blue...my kill switch has a black and a red and I grounded the black to the frame and connected the red to the white. and my bike went 300 miles with a working kill switch

now, did this 'fry' my mag or cdi?

This is how I am hooked up. This shouldn't destroy anything....who said it will?

[MrLarkins]

Originally Posted by Pablo

This is how I am hooked up. This shouldn't destroy anything....who said it will?

noone...but I'm just trying to figure out why my bike all of the sudden won't spark...

I was just be-boppin' along and it died...now there's no spark.

my first thought was water damaged something...but that turned out false...now I'm checking my wiring.

[Jakylpops]

first thing disconnect the kill switch from everything and make sure white wire is not grounding on anything, try to get the engine to fire with just the CDI connected "blue to blue, black to black" and nothing else...still no spark??

check the ignition wire, it just twists into the CDI hole on a little screw that sticks up, same with the sparkplug boot on my engine, make sure those connections are tight and making contact with the ignition wire. If none of this works I guess the next step is open the engine and check the magneto for bad connections or burnt wires, connect a voltmeter to the wiring and turn the engine over to see if it's putting out any voltage...etc.

[MrLarkins]

ok,...black to black and blue to blue...nothing else

no spark
watch video
http://www.oskgaming.com/images/Lark/nospark.wmv = 4MB


WARNING: IT'S KINDA BOUNCY TOWARDS THE ENDS

[Tj Bunch]

Is the mag more prone to burn than the CDI? I would think The CDI would go first, I'm no expert but mine i can't get a spark from anything never even fired engine yet everything tight trying to find what problem is.

[MrLarkins]

how do i test my mag and CDI

be VERY specific please...what needs to be connected, what needs to not be connected, where do i touch the black and red probes from ohmeter?

[Tj Bunch]

Mr. Larkins i'm with you waiting to see what happens......