Coil grounding question

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01 Aug 2014 04:37 #642255 by element303
Replied by element303 on topic Coil grounding question
just tested everything again. the problem seems to come from one of the pulse cables. it looks fine. nothing broken etc. also at the engine everything is connected. i took of the magnet or whatever it is and everything is clean, looking good.

Custom 1981 KZ750 rebuild project

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01 Aug 2014 05:07 #642259 by element303
Replied by element303 on topic Coil grounding question
I have the same exact issue as here:

69.46.28.106/forum/2-engine/566710-kz750-no-spark

Does anyone have the left pickup for the dyna s? I am pretty damn sure its not the cable. The pickup doesn't smell burned and looks fine so im not sure if its fried but it doesn't seem to work

Custom 1981 KZ750 rebuild project

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01 Aug 2014 07:03 #642280 by koolaid_kid
Replied by koolaid_kid on topic Coil grounding question
The next thing to do is check the wire for continuity. Put your multimeter into Ohms mode, set it to a fairly low level, 200 should do fine, and check it out. The reading should approach zero. It will not be entirely zero due to the internal resistance of the wire itself. If it goes all the way to 1, or infinity, set the multimeter to the next highest level. If it still goes to infinity, it is the wire. If it does not, it is the 1-4 output of your Dyna S itself.

1983 GPz 750
810 Wiseco, Kerker, K&N, DynoJet S3, Accel, Progressive, etc.

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01 Aug 2014 08:45 #642297 by element303
Replied by element303 on topic Coil grounding question
yeah i already attached another wire just to rule that out too. its 100% a bad pickup. i went to the motorcycle dude in town and he confirmed it. now im wondering if i could get the pickup alone because they only sell it as whole ignition online

do any of you guys have the left pickup of a dyna by any chance?

Custom 1981 KZ750 rebuild project

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01 Aug 2014 09:01 - 01 Aug 2014 09:04 #642305 by loudhvx
Replied by loudhvx on topic Coil grounding question
You did not mention a Dyna S in your original post.

You do know that you should not use the Dyna S with factory electronic ignition coils correct? If you do , the coil resistance will be too low and you will fry the Dyna S.

Dyna states the Dyna S should not be used with coils that are less than 3 ohms on the primary side. If you call Dyna, they may be able to help you get a new unit. They have helped out quite a few Dyna S owners.

What types of coils are you using?
Last edit: 01 Aug 2014 09:04 by loudhvx.

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01 Aug 2014 09:05 #642307 by element303
Replied by element303 on topic Coil grounding question
No eBay APP ID and/or Cert ID defined in Kunena configurationI didn't knew it before. I have those ones:



What other ignition can I use for that? I only find the Dyna in ebay

Custom 1981 KZ750 rebuild project

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01 Aug 2014 09:20 - 01 Aug 2014 09:22 #642311 by Patton
Replied by Patton on topic Coil grounding question
Apologies if already covered in this thread. :unsure:

As known:

A wire from the left-side (9 o'clock) Dyna-S pickup normally connects to the ignition coil that fires the two outside spark plugs #1 and #4 (reportedly no spark on the bike at hand).

A wire from the right-side (3 o'clock) Dyna-S pickup normally connects to the ignition coil that fires the inside spark plugs #2 and #3 (reportedly sparking on the bike at hand).


If not already done, may test to see whether connecting the signal wire from the right-side (3 o'clock) Dyna-S pickup to the other ignition coil will produce sparks on the two outside plugs #1 and #4.

If signal wire from the left-side (3 o'clock) Dyna-S pickup produces plug spark, but signal wire from the right-side (9 o'clock) Dyna-S pickup doesn't produce plug spark through the same ignition coil, it indicates that something's wrong with the right-side (9 o'clock) Dyna-S pickup or perhaps a break or short in the signal wire from the right-side (9 o'clock) Dyna-S pickup.

Good Fortune! :)

1973 Z1
KZ900 LTD
Last edit: 01 Aug 2014 09:22 by Patton.

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01 Aug 2014 09:48 - 01 Aug 2014 10:26 #642314 by element303
Replied by element303 on topic Coil grounding question
Yes thank you all done already.

So I got offered this one from a guy I bought parts already on eBay. Can I simply replace the dyna with this (probably) original one? Will it work with the part thats running on the shaft?


Attachment 20140801_122931.jpeg not found



Attachment 20140801_122947.jpg not found



EDIT: looks like its not the same.



I also found another dyna used but its the 1031. I seem to have 1021. Should the pickups be the same?

Custom 1981 KZ750 rebuild project

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Last edit: 01 Aug 2014 10:26 by element303.

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01 Aug 2014 11:00 #642324 by loudhvx
Replied by loudhvx on topic Coil grounding question

element303 wrote: So I got offered this one from a guy I bought parts already on eBay. Can I simply replace the dyna with this (probably) original one? Will it work with the part thats running on the shaft?

I also found another dyna used but its the 1031. I seem to have 1021. Should the pickups be the same?

That is the factory pickup unit. In order to use it, you would need the factory timing rotor and an igniter box.

Most Dyna S units look the same and look like they can be swapped, but I have never done it, so I can't be sure they all swap.

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01 Aug 2014 15:08 - 01 Aug 2014 15:09 #642359 by element303
Replied by element303 on topic Coil grounding question
No eBay APP ID and/or Cert ID defined in Kunena configurationI was already wondering where my igniter box is haha.

Yes they look the same.

I got an offer for this one now:


Custom 1981 KZ750 rebuild project

[img
Last edit: 01 Aug 2014 15:09 by element303.

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01 Aug 2014 16:18 #642375 by Patton
Replied by Patton on topic Coil grounding question
Z1E lists new for $133.

Good Fortune! :)

1973 Z1
KZ900 LTD

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01 Aug 2014 16:33 #642378 by element303
Replied by element303 on topic Coil grounding question
I found it new $125 and used $75 shipped

Custom 1981 KZ750 rebuild project

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