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1981 kz1000 no spark

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08 Mar 2022 18:13 #863426 by jpacewic
1981 kz1000 no spark was created by jpacewic
Hello again everyone. I got my carbs cleaned up. The bike fired right up and was running good. I rode it around the block a few times. The last time I rode it, started sputtering real bad. Pulled it back in the garage and I could not get it started again. Pulled a plug out and I got no spark. Replaced the coils and still nothing. Anybody have any suggestions?

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11 Mar 2022 09:13 #863589 by Wookie58
Replied by Wookie58 on topic 1981 kz1000 no spark
What is your battery voltage and what is the voltage on the positive side of the coils?

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17 Mar 2022 23:33 #863954 by jpacewic
Replied by jpacewic on topic 1981 kz1000 no spark
Battery is reading 11.4 V. Battery ground to positive wire to coil I read 11.4 V. Reading from coil ground wire to positive coil wire I only read 2 V. Doesn't make any sense to me. I appreciate all your help.

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17 Mar 2022 23:36 #863955 by jpacewic
Replied by jpacewic on topic 1981 kz1000 no spark
I apologize. I am reading 13.2 V at battery. All other readings are the same.

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18 Mar 2022 00:19 - 18 Mar 2022 00:22 #863956 by Wookie58
Replied by Wookie58 on topic 1981 kz1000 no spark
Where in the world are you, US and European spec bikes have variations in the wiring ?
what model do you have (J,K,M)
Last edit: 18 Mar 2022 00:22 by Wookie58.

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18 Mar 2022 08:42 #863976 by jpacewic
Replied by jpacewic on topic 1981 kz1000 no spark
I am in Arizona. Honestly I am not sure what model or engine I have. How can I tell?

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18 Mar 2022 09:35 - 18 Mar 2022 09:38 #863981 by TexasKZ
Replied by TexasKZ on topic 1981 kz1000 no spark
You can determine the model by the frame number. It is stamped on the steering head part of the frame. There should also be a sticker there with the frame number and other info. The engine number will tell you which version you have. It is usually stamped into a flat pad on top of the transmission case.

You can find the relevant numbers here —  www.kzrider.com/filebase?task=download.s...id=1178&catid=64&m=0

That information is also printed on the back cover of the factory service manual, though this does not account for any engine swapping that might have happened.   www.kzrider.com/modules/ServiceManuals/K...Service%20Manual.pdf
 

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
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www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24
Last edit: 18 Mar 2022 09:38 by TexasKZ.
The following user(s) said Thank You: Wookie58

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18 Mar 2022 12:25 #863992 by jpacewic
Replied by jpacewic on topic 1981 kz1000 no spark
Thanks for the info. So, from what I read it is a 1981, kz1000m1,csr,  new J engine. Mainly because it has spoke wheels. Is this correct?

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18 Mar 2022 12:28 #863993 by Wookie58
Replied by Wookie58 on topic 1981 kz1000 no spark
Ok I am assuming the bike in your profile pic is the one we are talking about which looks like an "M" to me given the spoked wheels and leading forks. I am also assuming the voltage readings of 13.2v for the battery and 11.4v at the coils are correct which means you are loosing 1.8v which is excessive (0.5v drop is about the most you would want) this means a resistance fault (bad switch, corroded connector etc)
I have put together the below test plan for you - make sure when testing that  the ignition is switched on and the kill switch is in the run position - keep a check on the coils that they don't start getting hot depending how long the testing takes you. This plan takes you all the way from the coils back to the battery. Happy hunting 
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The following user(s) said Thank You: KZmarcel

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18 Mar 2022 12:50 #863999 by Wookie58
Replied by Wookie58 on topic 1981 kz1000 no spark

Thanks for the info. So, from what I read it is a 1981, kz1000m1,csr,  new J engine. Mainly because it has spoke wheels. Is this correct?

The wheels and forks "SUGGEST" it's an "M" however, it's fourty years old so who knows how it left the factory ? The best bet is to use the link TexasKZ posted and check the vin (the wiring checks I sent are the same for J-Kand M)
 

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