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1st and 4th...no spark

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11 May 2006 13:50 #46651 by 80KZ1000
1st and 4th...no spark was created by 80KZ1000
I think its the 1st and 4th..Sitting on the bike its the outter left and outter right.

Anyways, I tried switching some wires around..the inner two wires can make all the plugs start and the outter two can't. Is this just as simple as buying a new set of wires?

Also do I have to take the tank off to do this?

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11 May 2006 14:01 #46656 by steell
Replied by steell on topic 1st and 4th...no spark
It's as simple as finding out what is wrong before buying parts :)
And yes you have to take the tank off.

Plenty of threads on here with descriptions of ignition troubleshooting, all you need is a multimeter.

1 & 4 is on one coil, and 2 & 3 is on the other coil.

KD9JUR

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11 May 2006 14:36 #46663 by 80KZ1000
Replied by 80KZ1000 on topic 1st and 4th...no spark
are the cylinders 1 2 3 4 from left to right?

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11 May 2006 14:55 #46666 by 80KZ1000
Replied by 80KZ1000 on topic 1st and 4th...no spark
OK so heres another question..

is it likely that both coils have the same problem with only giving half the juice? That seems unlikely to me.

I don't have a multimeter either..which is a huge pain I know.

Where are the coils? up by the headlight cluster?

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11 May 2006 18:59 #46702 by RonKZ650
Replied by RonKZ650 on topic 1st and 4th...no spark
Better get a manual and read up a little to learn. The coils are under the tank and are where your 4 spark plug wires originate. The engine, when rotated, triggers the coils to spark the plugs. One coil sparks cyls 1,4, the other 2,3. So you either have got a bad pickup on the end of the crankshaft not triggering the coil for 1-4 to fire (doubtful), a bad coil (doubtful), a bad ignition amplifier box or wire off the coil itself.
80KZ1000 wrote:

OK so heres another question..

is it likely that both coils have the same problem with only giving half the juice? That seems unlikely to me.

I don't have a multimeter either..which is a huge pain I know.

Where are the coils? up by the headlight cluster?


321,000 miles on KZ's that I can remember. Not going to see any more.

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12 May 2006 08:10 #46792 by rodneyo
Replied by rodneyo on topic 1st and 4th...no spark
check your pickup coil, my 80 model 1000 did the same thing.

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12 May 2006 15:55 #46882 by Dave Sloan
Replied by Dave Sloan on topic 1st and 4th...no spark
there are only 2 coils and both plugs that are connected to the coil will spark at the same time even though only one cylinder is in a condition to fire, its called wasted spark I believe. CAn you swap over hte wires from one coil to another and see if the coil works , that way you will be able to see if the coil is dud or the problem is elsewhere in the sytem

Z650B2 - Injected

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12 May 2006 17:46 #46897 by apeman
Replied by apeman on topic 1st and 4th...no spark
I agree with rodneyo that it is likely your pick-up coil. See my earlier thread with the exact same problem:

kzrider.com/component/option,com_joomlab...id,4/id,33390/#33390

You will need to get a manual to help you find your way around the bike unless you have been doing this for a while. Good luck!

Petaluma and Truckee, CA -- member since Jan. 23, 2003;
PREVIOUS KZs: 1980 KZ750H with 108,000 miles; 1980 KZ750E with 28,000 miles; and KZ750H street/cafe project, all sold a few years back.

This is what I do for fun, not for work. It is art, with a little engineering thrown in.

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