Which Spark Plug To Use
- daveo
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Which Spark Plug To Use
19 Apr 2019 21:20 - 20 Apr 2019 06:31
I have been running Accel 142 U-Groove spark plugs for a good while now.
I believe they are NON-Resistor plugs...
Will NGK Platinum BR8EVX work properly with NGK resistor caps?
Wires are copper-core Dynatek < 3 ohm Mini-Coils < 2000 ignition.
Just pulled the plugs out and took the picture below.
Need advisement how to enhance combustion by changing the spark plug gap?
Thanks in advance.
Will NGK Platinum BR8EVX work properly with NGK resistor caps?
Wires are copper-core Dynatek < 3 ohm Mini-Coils < 2000 ignition.
Just pulled the plugs out and took the picture below.
Need advisement how to enhance combustion by changing the spark plug gap?
Thanks in advance.

1982 KZ1100-A2
Last edit: 20 Apr 2019 06:31 by daveo.
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- Street Fighter LTD
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Re: Which Spark Plug To Use
20 Apr 2019 05:53
Either plug , Or wire / cap can be resistor .
Not Both
Is my understanding
Dave
Happy Easter
Not Both
Is my understanding
Dave
Happy Easter
Original owner 78 1000 LTD
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- daveo
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Re: Which Spark Plug To Use
20 Apr 2019 06:40Street Fighter LTD wrote: Either plug , Or wire / cap can be resistor .
Not Both
Is my understanding
Dave
Happy Easter
I'll run them and report back with my findings.

1982 KZ1100-A2
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- Nessism
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Re: Which Spark Plug To Use
20 Apr 2019 06:40
Some KZ bikes specify resistor plugs in certain markets, Europe for example, while in the US the spec is non resistor. I'm not sure what this is all about but I take it to mean that using a resistor plug won't hurt anything.
Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0
www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know
1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0
www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know
1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread
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Re: Which Spark Plug To Use
20 Apr 2019 06:49daveo wrote: I have been running Accel 142 U-Groove spark plugs for a good while now. I believe they are NON-Resistor plugs...
Will NGK Platinum BR8EVX work properly with NGK resistor caps?
Wires are copper-core Dynatek < 3 ohm Mini-Coils < 2000 ignition.
Just pulled the plugs out and took the picture below.
Need advisement how to enhance combustion by changing the spark plug gap?
Thanks in advance.
I ran exotic plugs when I was fouling them due to bad valve guide seals. Since then I've been running standard B8ES plugs and mine look like that. I think it's a combination of rings, seals, lower compression and bigger non stock carbs. They say you'll never be able to get the bike to idle as low as you can with the stock carbs and I'm beginning to agree with them. Even with new rings and seals I suspect that will be as good as it gets.
For now I'll just ride the piss out of it and enjoy.
Steve
BTW, unless you are using a AM radio, resister plugs or wires aren't needed.
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
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Re: Which Spark Plug To Use
20 Apr 2019 07:18
Have always read never to run both resister caps and plugs together too. Since you are always trying to get your bike to be running as best as it can I wouldn't...... I've also read that you can increase gap to around .037 up from the stock .028-.032 if you have high output coils and pick up a "tiny bit of power" but some on here didn't like that idea so I stuck with .032 as a compromise. I've always run solid core wires and non res plugs but then again have read having one or the other resistor doesn't hurt performance. Where's Jay or some other expert when you really need there advice.:woohoo:
1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.
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- slmjim+Z1BEBE
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Re: Which Spark Plug To Use
20 Apr 2019 14:18
Resistors (wires, caps or plugs) in series with the HV circuit(s) is predominantly for RF noise suppression.
An added benefit is reduction in spark current (amperage) which significantly reduces electrode erosion.
www.ngk-sparkplugs.jp/english/techinfo/qa/q08/index.html
Good Ridin'
slmjim & Z1BEBE
An added benefit is reduction in spark current (amperage) which significantly reduces electrode erosion.
www.ngk-sparkplugs.jp/english/techinfo/qa/q08/index.html
Good Ridin'
slmjim & Z1BEBE
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1973 ('72 builds) Z1 x2
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A Rider looks at your odometer and tags.
1973 ('72 builds) Z1 x2
1974 Z1-A x2
1975 Z1-B x2
1993 CB 750 Nighthawk x2
2009 ST1300A
www.kawasaki-z-classik.com/index.html/
A Forum tightly focused on all things Z1 and Z2.
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