1978 GS 400 Ignition w/ CDI wiring diagram

[Mailo]

I have never seen one of those before.

Read the number on the side look up the manufacturer and see if there is a data sheet.

Pietcard, its an Argentine manufacturer.

but aren't all the cdi's the same?

i only need a diagram to wire it.

[tom203]

"...but aren't all the cdi's the same?"

not that I know. I had a Kawasaki two stroke single with cdi which ran off magneto .Your unit on a twin four stroke would be different. Is the manufacturer still in business?

[posplayr]

We have told you and repeated that there are no CDIs that we are aware of. You continually refer to this as a CDI ignition. So why do you think that we would think they are wired the same?

[Mailo]

Ok im sorry, im speaking without knowledge, hope you guys can help me.

i refer at that as CDI Ignition becouse that little box says so "PIETCARD CDI 2048 "

the only thing i know to help you figure how to wire this thing is

Its a CDI, it has 5 pins. that's the onlything i know


i found this diagram in the web

CDI con avance 1.jpg


Bujia = Spark Plug
Bobina de alta = Spark Coil
Llave de pare = Kill switch
Volante magnetico = magnetic wheel
Bobina de Alimentacion = Alimentation Coil ( i don't know if it means the stator, or a coil for the sensor )

[posplayr]

That is a good start, and it in fact appears to be a CDI. (OK I pulled up a larger picture) Is there anything else indicating the color of the wires?

Black is probably ground
A red or Orange is probably from the kill switch.

The rest are anybody's guess. Can you tell from how it was wired before?

[posplayr]

Let me be clear, this is not standard and I don't think anybody has the wiring information in their head. So you are just going to have to figure out how it is supposed to be wired. First was it wired up in the first place and was it running? Or did it ever run that way?

What you describe as a mess is likely the only information you have on how it is supposed to be, so go find the wiring and a piece of paper and write down which wire and color corresponds to which as well as the connector position of each.

You can see that the little black box (Blue) under the ignition cover is probably the magnetic pickup wire. By a process of elimination the other is the alternator? wire.

[Gorminrider]

Im seeing some wiring diagrams and in some of them i see that the pulse comes from the stator, in others from a pulse generator like the one in my bike

That'd be a different bike altogether-perhaps a '79 Honda CX500 -they do have a special coil built into the stator for this. However, the pulse-generator connection may be the same and may help you.
Yes, the colours of the wires may help a lot to figure it out.
The colours of the wires may match the Honda norm, where green wires are ground, black wires are 12 volt "hot". On our Suzukis, Red is 12vhot and Black/white stripe is ground, but there are many other colours too and what I said is really simplistic...but I am hoping the manufacturer matched the colours to some bike's wiring colours

[Gorminrider]

The green wire in your pictures says Honda to me. That will be Ground, if I am right. If there is a wire with a green stripe, it may go to kill switch per the wiring diagram.

[Gorminrider]

I am looking at your first picture posted ,mailo and I also wonder if the bike ever ran like this. Posplayer pointed out the missing mechanical advance mechanism which our bikes use. I fear the previous owner was trying to make it work before he sold it to you....? Trying to fit something that never will.
but tell us the wire colours whatever.

[Mailo]

I am looking at your first picture posted ,mailo and I also wonder if the bike ever ran like this. Posplayer pointed out the missing mechanical advance mechanism which our bikes use. I fear the previous owner was trying to make it work before he sold it to you....? Trying to fit something that never will.
but tell us the wire colours whatever.

The mechanical advance ( or as i call centrifugal advance) its behind the plate of the sensor.
I was told the bike ran with this conection, but im doubt it

i looked for the number in the CDI box and i readed that its used on hondas CB

[Mailo]

This is the current wiring diagram of the ignition

100_7303.jpg

[Mailo]

There seems to be some confusion with the Kill switch.
Standard Suzuki kill switch out is Orange/White. But that is also the output of the fuse box as well. The O/W from the kill switch connector is what powers the whole ignition circuit as shown.

So i can connect a power source (battery) to the O/W wire before the kill switch and it should run?

[Gorminrider]

The mechanical advance ( or as i call centrifugal advance) its behind the plate of the sensor.

good news!

that its used on hondas CB

making progress! Maybe try to find wiring diagrams for cb350, cb360 cl350 ... i n general, medium Honda twins with batteries and charging systems- not magneto type bikes! . Cross reference colours to suzuki diagram as the previous owner must have done and you might have it!

I was told the bike ran with this conection but im doubt it

No, you have to trust them or throw it away. Previous owners don't usually lie, but they often forget to tell you important details. I mean, look how hard we are working here to get the important details from you. ..Carry on!

[Mailo]

good news!

making progress! Maybe try to find wiring diagrams for cb350, cb360 cl350 ... i n general, medium Honda twins with batteries and charging systems- not magneto type bikes! . Cross reference colours to suzuki diagram as the previous owner must have done and you might have it!


No, you have to trust them or throw it away. Previous owners don't usually lie, but they often forget to tell you important details. I mean, look how hard we are working here to get the important details from you. ..Carry on!

Thank you ill look to it

[tom203]

The picture you show is a magneto style cdi, like you'd find on dirt bike- no battery needed,as that coil powers the ignition system . In your setup, the cdi box needs a power source to enable it to fire when triggered by sensor.