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Spark Plug Gap

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05 Jul 2020 20:29 - 06 Jul 2020 07:19 #829899 by F64
Replied by F64 on topic Spark Plug Gap
Sorry, If you saw my editing changes...i've been all over the place.

I've just realized you may have to install a relay to get voltage your coil needs.
Not hard.
Plenty of people here have done it.
Some of the others can chime in as they have been here longer and know where to find the best instructions for the modification.
If you still have the issue with the weak spark, I'll see if there are some other things we can check.
But first, let's get a relay installed to get your coil the proper power.

Check your spark plug resistance.
It's should be no higher than 5000 ohms.
They both should be pretty close in readings.
Put one probe on the terminal nut. The other probe on the center electrode.



81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
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Last edit: 06 Jul 2020 07:19 by F64.

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06 Jul 2020 09:37 #829921 by Mikaw
Replied by Mikaw on topic Spark Plug Gap
Here is the coil relay mod... I’ve done it, very simple and good insurance.

www.wgcarbs.com/index.php/using-joomla/e...-categories/89-coils

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
The following user(s) said Thank You: luisazmz

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06 Jul 2020 10:03 #829925 by F64
Replied by F64 on topic Spark Plug Gap
Thanks Mikaw,
Luis,
Your points electrically seem fine.
One of your readings in the very beginning threw me off. I may still have you check your point gap. Just to rule out a short dwell time.

81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
The following user(s) said Thank You: luisazmz

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06 Jul 2020 14:34 - 06 Jul 2020 14:35 #829956 by luisazmz
Replied by luisazmz on topic Spark Plug Gap
Both spark plugs are reading roughly 1200Ω. Thank you for the relay suggestion I went ahead and ordered it to install it tomorrow.
Edit: I've checked the points gap and it's set to .35mm which is what the manual suggest, and the points fully touch when closed.
Appreciate the help!
Last edit: 06 Jul 2020 14:35 by luisazmz.

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06 Jul 2020 14:56 #829961 by ckahleer
Replied by ckahleer on topic Spark Plug Gap
1200 ohms sounds fishy. Most resistor plugs are 5000 ohms, but there may be other values. You should do a quick check on line and verify if that resistance is correct for that plug.

94 KE100
81 CM200t
82 KZ305
85 VF1100c

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07 Jul 2020 09:11 #830008 by F64
Replied by F64 on topic Spark Plug Gap
1200 is fine.
He shouldn't need to run a resistor plug.
Just don't ride near Arecibo with the bike.

81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY

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07 Jul 2020 09:22 #830010 by Mikaw
Replied by Mikaw on topic Spark Plug Gap
Arecibo???

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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07 Jul 2020 09:27 #830011 by F64
Replied by F64 on topic Spark Plug Gap
www.naic.edu/ao/
The scientists wouldn't be very happy.

photo: Alessondra Springmann


81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
Attachments:

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07 Jul 2020 10:08 #830015 by Mikaw
Replied by Mikaw on topic Spark Plug Gap
Looks like a James Bond location

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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07 Jul 2020 10:26 #830018 by F64
Replied by F64 on topic Spark Plug Gap
yep!


81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY

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07 Jul 2020 11:03 #830023 by luisazmz
Replied by luisazmz on topic Spark Plug Gap
These are the spark plugs I'm using:
www.ngk.com/product.aspx?zpid=9229

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07 Jul 2020 12:51 #830034 by TexasKZ
Replied by TexasKZ on topic Spark Plug Gap
As a rule, the deal with resistors in the secondary loop is -- you can use resistor sparkplugs, OR resistor caps OR resistor wires, but never more than one of those three. You can, of course, run resistor nothing, keeping in mind that you may really irritate nearby motorists listening to their radio and maybe even the SETI folks and their big dishes.

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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