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TOPIC: Ignition Coil

Ignition Coil 01 Dec 2019 09:43 #814801

  • zachsnacks
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Alright, more tests and now I have caught a small smoking gun that I think it might be.

Bike came with aftermarket ignition coil that was replaced with this one - www.amazon.com/gp/product/B014WWNHGK/ref...01_s00?ie=UTF8&psc=1

initial one and new one are reading .3 primary resistance.

Manual states much higher.

Electronic ignition, not points if that matters, I have heard electronic can run less than 4 ohms.

Replace the ignition coil? And with which one?

Thanks in advance.
1983 Kawaski 440 Ltd
I promise I wont make it a cafe racer if you help me out.

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Ignition Coil 01 Dec 2019 09:56 #814803

  • 73z1
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Ignition Coil 01 Dec 2019 10:10 #814804

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This is the one I got, that seems to be the problem - www.amazon.com/gp/product/B014WWNHGK/ref...01_s00?ie=UTF8&psc=1
1983 Kawaski 440 Ltd
I promise I wont make it a cafe racer if you help me out.

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Ignition Coil 01 Dec 2019 10:57 #814807

  • Nessism
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.3 ohms is super low. Are you sure? Not 3 ohms? And what does your manual state? I don't know about the 440 but on my 750 the coils are supposed to be 1.8-2.8 ohms which is pretty low as far as '80s coils go.

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Ignition Coil 01 Dec 2019 11:57 #814809

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.3 - 100% just triple checked it.
The secondary winding test registered correct, so I know the multimeter is working.
1983 Kawaski 440 Ltd
I promise I wont make it a cafe racer if you help me out.

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Ignition Coil 02 Dec 2019 09:48 #814842

  • loudhvx
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On the lowest scale, touching the leads together might give a reading of .3 ohms. Are you sure nothing is shorted in the wiring that you are testing?

Like Nessism said, .3 is extremely low. I was also going to ask if you meant 3 ohms, but he beat me to it.

At .3 ohms you will destroy the igniter pretty quickly. So don't even try to use that coil. Hopefully the igniter is still good.
Also, at .3 ohms, I would have expected a fuse to blow or the igniter to smoke or the coil to smoke.

Like Nessism said, your coil should be in that 1.8 to 2.8 range. The target value is 2.3 ohms and most tend to be in the 2.3 to 2.6 ohm range.

A 4 ohm coil would be for points.

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Ignition Coil 03 Dec 2019 12:01 #814884

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Thats what I thought too! But I swear .3, I am ordering a new one tomorrow. Keep you posted.

The secondary test came out perfect, so I know the multimeter is set correctly.
1983 Kawaski 440 Ltd
I promise I wont make it a cafe racer if you help me out.

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Ignition Coil 04 Dec 2019 19:29 #814925

  • baldy110
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And the coil should also cost more than $18.00. That price to me is a red flag.
The following user(s) said Thank You: SWest

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Ignition Coil 05 Dec 2019 07:47 #814943

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Right?! That was my first red flag, but I took a shot anyways. I think thats my smoking gun, I have ordered the new one coming from Japan.

If anyone has one that can come faster I would be very appreciative.
1983 Kawaski 440 Ltd
I promise I wont make it a cafe racer if you help me out.

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Ignition Coil 11 Dec 2019 15:15 #815247

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Brand new NGK ignition. Still missfiring at 3500-4000.

Any guesses left on the table?

Buddy of mine says replace the carbs.
1983 Kawaski 440 Ltd
I promise I wont make it a cafe racer if you help me out.

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Ignition Coil 11 Dec 2019 16:55 #815249

  • hardrockminer
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Maybe tell us what's been done to the carbs, and whether you have a stock intake and exhaust. Also, have you done a compression test and checked your valve clearance? Any photos of the carbs?
I have a couple of Z1B's restored, an '80 KZ1000LTD restored, a 1981 KZ550 restored and a 2008 KLR 650 for off road fun. My wife has a 2019 Suzuki DR 650 for on and off road.

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Last edit: by hardrockminer.

Ignition Coil 11 Dec 2019 17:17 #815251

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Sorry, I broke my initial thread and started this one, it was all included originally.

Stock air box, stock carbs, jets are all clean as a whistle, carb seals are all new and new diaphrams. Compression test done, it was a little on the low side but still within limits. Valves are done, battery has been tested with high beam test and load is showing 12.2

My initial smoking gun was the ignition coil being the wrong one but since being replaced its not the answer.

Last idea, the left side exhaust does not flow as strong as the right. (air to fuel mixture was taken back to zero and turned 2 and 1/4 turn out.) The right exhaust pipe hits my hand with exhaust puff leaving the pipe. The Left exhaust pipe has exhaust coming out but not with as much power, its a decent amount but weaker than the right.
1983 Kawaski 440 Ltd
I promise I wont make it a cafe racer if you help me out.

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Ignition Coil 12 Dec 2019 05:20 #815262

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It looks like you had more than one problem. The coil was definitely bad and needed to be replaced.

Is there a crossover pipe on the exhaust? I have one on my wife's 550.

I don't know anything about your bike but normally fuel/air screws are turned about 1 to 1 1/2 turns out from lightly closed. If you have a carb issue I would look at things that affect the mid rpm range. This would include float levels, main jet diffuser, needle settings and jet needles. I don't know what rebuild kits you used but I like Keyster....great quality. I wouldn't use anything else.
I have a couple of Z1B's restored, an '80 KZ1000LTD restored, a 1981 KZ550 restored and a 2008 KLR 650 for off road fun. My wife has a 2019 Suzuki DR 650 for on and off road.

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