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KZ650. Crossed wires and engine out of phase? 11 Nov 2022 11:37 #876644

  • ShaneDude
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Id been having a problem with my KZ650. Backfiring and pipes 1 & 2 being cold. Turns out my brother, who was helping with the bike, mixed the cord order. it has dyntek coils and he had the left coil going to cylinders 1 and 2 and the right coil going to cylinders 2 and 4.

I corrected it and not the bike wont start properly. A friend said something about the bike now being "out of phase."
Does this sound logical, and how can i correct it?

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KZ650. Crossed wires and engine out of phase? 11 Nov 2022 11:47 #876645

  • Warren3200gt
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As I said before 1 coil does plug 1 & 4, the other does plugs 2 & 3.
If it's "out of phase" you just need to reverse the coil feeds where they join the loom. Alternatively swop the feed wire on the coils, whichever is easier.
Out of phase means plugs 1 & 4 are firing when 2 & 3 should be and vice versa. Swopping the trigger wires over will put it back "in phase" 

Z1000J2 somewhat modified!

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Last edit: by Warren3200gt.

KZ650. Crossed wires and engine out of phase? 11 Nov 2022 11:58 #876647

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As I said before 1 coil does plug 1 & 4, the other does plugs 2 & 3.
If it's "out of phase" you just need to reverse the coil feeds where they join the loom. Alternatively swop the feed wire on the coils, whichever is easier. 



 

Thanks! I was on the phone with a Dynatek rep earlier.
He told me to take wire on cylinder 2 and put it on 1 cylinder and put the 1 onto 2 and do the same with 3 and 4. He also suggested the loom thing too. Do you agree with the 2 to 1 and 4 to 3 wire swap to fix the problem?

Im not sure what you mean in what you said.

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KZ650. Crossed wires and engine out of phase? 11 Nov 2022 12:02 #876648

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I assume you mean plug caps? And yes that would also work If the ht leads are long enough to accommodate this. Frequently they are not. 

Z1000J2 somewhat modified!

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KZ650. Crossed wires and engine out of phase? 11 Nov 2022 12:03 #876649

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I assume you mean plug caps? And yes that would also work If the ht leads are long enough to accommodate this. Frequently they are not. 
 

Yes the plug caps. My wires are long so it will work. What is the theory behind doing this? How does it fix the phase issue?

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KZ650. Crossed wires and engine out of phase? 11 Nov 2022 12:06 #876650

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READ my earlier post. It's all explained clearly.
Simple ignition wiring diagram for you. 
 

Z1000J2 somewhat modified!

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Last edit: by Warren3200gt.

KZ650. Crossed wires and engine out of phase? 11 Nov 2022 12:18 #876652

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One coil feeds 1 - 4 cylinders and the other 2 - 3 .
If the bike won't start then either switch the LT  feed wires from the ignition or swap the HT leads over to the other cylinders.
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KZ650. Crossed wires and engine out of phase? 11 Nov 2022 12:20 #876653

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Horses and water springs to mind Rob. 

Z1000J2 somewhat modified!

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KZ650. Crossed wires and engine out of phase? 11 Nov 2022 12:27 #876655

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One coil feeds 1 - 4 cylinders and the other 2 - 3 .
If the bike won't start then either switch the LT  feed wires from the ignition or swap the HT leads over to the other cylinders.



 

I just saw warren's earlier message. now I get it.

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KZ650. Crossed wires and engine out of phase? 11 Nov 2022 12:38 #876656

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The diagram shows 1 coil feeding 2 cylinders NOT cylinders 1 & 2 or 3 & 4. Diagrams are drawn for simplicity not positional accuracy.
As I, Rob (zed1015), and dynatek have told you 1 coil supplies cylinders 1 & 4, the other does 2 & 3.

Z1000J2 somewhat modified!

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KZ650. Crossed wires and engine out of phase? 11 Nov 2022 12:38 #876657

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Id been having a problem with my KZ650. Backfiring and pipes 1 & 2 being cold. Turns out my brother, who was helping with the bike, mixed the cord order. it has dyntek coils and he had the left coil going to cylinders 1 and 2 and the right coil going to cylinders 2 and 4.

I corrected it and not the bike wont start properly. A friend said something about the bike now being "out of phase."
Does this sound logical, and how can i correct it?
First of all, be careful taking information from people on the internet that you don't trust.  They may trick you and cause your bike to blow up. 

Secondly, this post makes no sense.  You can't have two plug leads both going to cylinder 2.  Correct your information and then maybe someone can help you.

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Last edit: by Nessism.

KZ650. Crossed wires and engine out of phase? 11 Nov 2022 12:48 #876659

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One coil feeds 1 - 4 cylinders and the other 2 - 3 .
If the bike won't start then either switch the LT  feed wires from the ignition or swap the HT leads over to the other cylinders.




 

This is what im not understanding:



The diagram Warren attached shows one coil feeding cylinders 1& 2 and one feeding 3 & 4. According to Dynatek, thats not how it works. The Left Coil feeds 1 & 4 and the Right Coil feeds 2 & 3.



 
Yes! The diagram Warren posted is unclear just because the plugs aren't numbered on it but the wiring is correct .
One coil feeds cylinders 1 - 4 and the other 2 - 3.
HT ( high tension) refers to the plug wires and LT ( low tension) to the wires from the ignition to the coils.



 
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kzrider.com/forum/23-for-sale/611992-air-corrector-jets-





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Last edit: by zed1015.
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