Help no spark

  • Chaseyou0
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Help no spark

05 Nov 2018 22:53
#793447
I have a zn700ltd that had no wiring when I got it I'm trying to wire it like a bobber just the running part but I can't get spark at the plugs I'm confused I've tried everything I know

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  • TexasKZ
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Re: Help no spark

06 Nov 2018 04:15
#793449
There is already a thread on this subject.

www.kzrider.com/forum/4-electrical/609557-wiring-help#793437
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24

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  • Patton
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Re: Help no spark

06 Nov 2018 07:03 - 06 Nov 2018 07:13
#793461
Chaseyou0 wrote: I have a zn700ltd that had no wiring when I got it I'm trying to wire it like a bobber just the running part but I can't get spark at the plugs I'm confused I've tried everything I know

Bear in mind that ignition wiring only needs battery+ voltage to the coils and another wire from each coil to points or Dyna-S or whatever mechanism repeatedly grounds and un-grounds the coil.
It's the un-grounding that creates the high voltage surge through the spark plug wires.

For test running, it's okay to run a hot battery+ wire to the coils, which must be disconnected whenever the engine isn't running or being started.

Here's some diagrams that have helped me understand what's going on:
















Good Fortune! :)
1973 Z1
KZ900 LTD
Last edit: 06 Nov 2018 07:13 by Patton.

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Re: Help no spark

06 Nov 2018 07:12
#793463
An interruption for whatever reason in the secondary circuit can result in a non-firing spark plug.

Here are some examples of a flawed secondary circuit:











Good Fortune! :)
1973 Z1
KZ900 LTD

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