Need help on getting a spark

  • Leor13
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Need help on getting a spark

06 Jul 2018 22:12
#786552
So from my previous message I am trying to get this bike some life. So right now my main goal is to get a spark, but unfortunately I cant. I need your help guys on what to do and what to trace "electrical wise" to get that spark. I need to know what number do I put on the multimeter to check on the Ohms for continuity. I have the manual but its not the same as my multimeter.

For starters I got a new battery but after that I am not sure. Just want some step by step guide on what to check next and how to check them, weather using the multimeter for OHMs of Volts or the Light Check.

Motorcycle :
1978 Kawasaki KZ750 B

Thank you so much for the time in advance

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  • Warren3200gt
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Re: Need help on getting a spark

06 Jul 2018 22:25 - 06 Jul 2018 22:42
#786554
You need to trace backwards from the coil live using a multimeter set to volts.
If you have coils with terminals on the back, check the volts to it by putting the live meter lead on and the neg to earth. If the reading is zero, move backwards and do the next terminal fron the loom to the coil lead. continue moving backwards i the loom u til you get a reading. When you do, you know the fault lies in the wiring/component you checked before you got a reading.
All this with the ignition switched on obviously.
If you do have power at the coil then you need to check the primary and secondary windings of the coil, if that checks out ok, move onto plug ht leads, plug caps, plugs.

Z1000J2 somewhat modified!

Last edit: 06 Jul 2018 22:42 by Warren3200gt.
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Re: Need help on getting a spark

07 Jul 2018 13:04
#786578
Thank you so much for the info...I will do this and see what it will result to

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Re: Need help on getting a spark

08 Jul 2018 00:19
#786597
Are you still able to get voltage results even if the motorcycle is not running ? just by turning it on?

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Re: Need help on getting a spark

08 Jul 2018 00:49 - 08 Jul 2018 00:59
#786599
Yes, the live to the coils should be live when the ignition is on regardless of if the points are open or closed.

Z1000J2 somewhat modified!

Last edit: 08 Jul 2018 00:59 by Warren3200gt.

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  • SWest
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Re: Need help on getting a spark

09 Jul 2018 06:17
#786658
Dirty points will prevent spark (oil,dirt, etc) Clean with a points file (fingernail file) and clean with a folded match book cover. If the points are pitted, it's the condenser that's bad. Heavy blue sparking at the points is the tip off.
Steve

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Re: Need help on getting a spark

09 Jul 2018 10:13
#786681
Having taken a closer look at the points pic the gap looks suspiciously wide and I wonder if they are contacting when closed.

Z1000J2 somewhat modified!

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  • Scirocco
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Re: Need help on getting a spark

09 Jul 2018 14:23 - 09 Jul 2018 14:27
#786692
Some helpful hints




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Last edit: 09 Jul 2018 14:27 by Scirocco.
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Re: Need help on getting a spark

13 Jul 2018 09:38
#786894
So good news....I got spark!!!YES thank you to all the post you provided, that helped me a lot on the things I need to focus on.

I changed the contact points and Ignition coils, for the ignition coils I was not getting any reading and for the contact points it was just dirty and corroded.

So now off to rebuilding the carb and making all the wires neat and clean before test start.

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