KZ750 Spectre help
- JohnLuke
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KZ750 Spectre help
31 Oct 2017 19:25 - 31 Oct 2017 19:43
Help, I am rebuilding this bike from the ground up. I am wondering can I use these wiring diagrams on my bike? Is this wiring diagram even compatible with my bike? And can I get rid of the ic igniter because I bought a Dyna S ignition coil and timing ignition. Will that allow me to get rid of some stuff? I ask because I don’t want to have to buy a new Ic igniter/cdi . Ik I need the regulator/rectifier because it’s in the diagram. Thanks!
Last edit: 31 Oct 2017 19:43 by JohnLuke.
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- JohnLuke
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Re: KZ750 Spectre help
31 Oct 2017 19:45
Can I use this diagram on my bike? What I mean is because I have the Dyna s system can I get rid of the ic igniter/cdi? I don’t want to buy another one.
Thanks!
Thanks!
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- loudhvx
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Re: KZ750 Spectre help
31 Oct 2017 20:31 - 31 Oct 2017 20:38Not exactly as is. First, the Dyna S will take the place of the points, but it needs a switched power source.JohnLuke wrote: Can I use this diagram on my bike? What I mean is because I have the Dyna s system can I get rid of the ic igniter/cdi? I don’t want to buy another one.
Thanks!
The Dyna S will require 3 ohm coils. Your original coils would have been 2.3 ohm coils and are not recommended for the DynaS.
The regulator/rectifier most likely has a brown wire. That brown wire must go to a switched power source to sense the battery voltage when the bike is running. If not, you can fry the whole system.
You should probably have two brake light switches.
And it's always better to run dedicated ground wires to everything and run that back to where the battery cable connects to the engine. The frame for whatever reason doesn't tend to work out too well as a ground.
Just curious, why do you have two diagrams posted?
Are they different?
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Kz550 valve train warning.
Other links.
Last edit: 31 Oct 2017 20:38 by loudhvx.
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- JohnLuke
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Re: KZ750 Spectre help
01 Nov 2017 08:51
Sorry, I didn’t mean to do that.
Oh okay. I understand that the dyna s replaces the points but does that mean I still need the ic igniter? I’m just asking ahead of time so I can get an idea. I really apprecitate the help. Goodness knows I need it. I’ll definatly need the help with the wiring.
Thanks!
Oh okay. I understand that the dyna s replaces the points but does that mean I still need the ic igniter? I’m just asking ahead of time so I can get an idea. I really apprecitate the help. Goodness knows I need it. I’ll definatly need the help with the wiring.
Thanks!
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- loudhvx
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Re: KZ750 Spectre help
01 Nov 2017 09:08
No, the dyna s does not use the factory igniter. But don't throw it away, someone wants it and the original pickups and rotor if you have it. That stuff is getting hard to find. The original factory system was a lot more efficient, more sophisticated, and possibly more reliable over the course of 40 years.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Kz550 valve train warning.
Other links.
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- Patton
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Re: KZ750 Spectre help
01 Nov 2017 09:10JohnLuke wrote: Sorry, I didn’t mean to do that.
Oh okay. I understand that the dyna s replaces the points but does that mean I still need the ic igniter? I’m just asking ahead of time so I can get an idea. I really apprecitate the help. Goodness knows I need it. I’ll definatly need the help with the wiring.
Thanks!
An ic igniter is a component of a factory electronic ignition that does not have points.
Good Fortune!

1973 Z1
KZ900 LTD
KZ900 LTD
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- JohnLuke
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Re: KZ750 Spectre help
01 Nov 2017 12:02
Okay, so I guess my question now is, how do I wire my bike with the new Dyna s system? Like is there a diagram I could follow? And is there a Dyna s ic igniter that I have to buy? Lol help. Can I not just wire the bike using that diagram? Like I said b4, because I got the Dyna s system does that enable me to not use the ic igniter?
Like I’m really confused.
Thanks!
Like I’m really confused.
Thanks!
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- loudhvx
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Re: KZ750 Spectre help
01 Nov 2017 13:31 - 01 Nov 2017 13:34
The Dyna S is an igniter and pickup all in one unit. It needs no other external igniter of any kind.
But as I mentioned earlier you need to know what coils you have. So what coils do you have?
Also, is there a brown wire on your regulator/rectifier? If so, you need to address that (as I detailed earlier) or you will fry the Dyna S in no time.
So no, you can't necessarily just follow that wiring diagram you posted. It is incomplete.
Do you have the rotor for the Dyna S? If not, you will need that.
There should be a diagram showing how to wire a Dyna S specifically for a Kz. You can download it from Dyna or probably get it from Google. Either way, you probably want to google it so you can get tips on how to avoid the pitfalls of the Dyna S. There must be dozens of posts on Kzrider related to the Dyna S.
Your diagram shows points, and is very vague on that anyway, so no that diagram won't really help you. You need the Dyna S diagram. But ignoring the regulator issue will get you stranded.
But as I mentioned earlier you need to know what coils you have. So what coils do you have?
Also, is there a brown wire on your regulator/rectifier? If so, you need to address that (as I detailed earlier) or you will fry the Dyna S in no time.
So no, you can't necessarily just follow that wiring diagram you posted. It is incomplete.
Do you have the rotor for the Dyna S? If not, you will need that.
There should be a diagram showing how to wire a Dyna S specifically for a Kz. You can download it from Dyna or probably get it from Google. Either way, you probably want to google it so you can get tips on how to avoid the pitfalls of the Dyna S. There must be dozens of posts on Kzrider related to the Dyna S.
Your diagram shows points, and is very vague on that anyway, so no that diagram won't really help you. You need the Dyna S diagram. But ignoring the regulator issue will get you stranded.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Kz550 valve train warning.
Other links.
Last edit: 01 Nov 2017 13:34 by loudhvx.
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- JohnLuke
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Re: KZ750 Spectre help
02 Nov 2017 09:22
Okay, great! Very helpful. I have the Dyna s complete system which mean I gave the Dyna s ignition coils and the Dyna s electronic points. I think that’s all I need.
Thanks.
Thanks.
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- JohnLuke
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Last edit: 02 Nov 2017 09:24 by JohnLuke.
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- Patton
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Re: KZ750 Spectre help
03 Nov 2017 06:15 - 03 Nov 2017 06:48The rotor is installed so that the embedded magnet passes the left side pickup module when the F1/4 mark aligns with the case mark.
Good Fortune!

1973 Z1
KZ900 LTD
KZ900 LTD
Last edit: 03 Nov 2017 06:48 by Patton.
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- Patton
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Re: KZ750 Spectre help
03 Nov 2017 07:06 - 03 Nov 2017 07:10
Here's what's supposed to happen while the engine's running.
When the embedded rotor magnet passes by the left side pickup module, the ground connection from the ignition coil is interrupted, which loss of ground causes the ignition coil to fire both outside spark plugs.
When the embedded rotor magnet passes by the right side pickup module, the ground connection from the other ignition coil is interrupted, which loss of ground causes that ignition coil to fire both inside spark plugs.
It's comparable to a points system where opening of the points is what interrupts the ignition coil's ground connection.
Good Fortune!
When the embedded rotor magnet passes by the left side pickup module, the ground connection from the ignition coil is interrupted, which loss of ground causes the ignition coil to fire both outside spark plugs.
When the embedded rotor magnet passes by the right side pickup module, the ground connection from the other ignition coil is interrupted, which loss of ground causes that ignition coil to fire both inside spark plugs.
It's comparable to a points system where opening of the points is what interrupts the ignition coil's ground connection.
Good Fortune!

1973 Z1
KZ900 LTD
KZ900 LTD
Last edit: 03 Nov 2017 07:10 by Patton.
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