KZ900 Spark Plug Recommendations

Lebowski
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KZ900 Spark Plug Recommendations

26 Jul 2021 10:35

76-KZ900 here. Do any of you guys foresee an issue with using BP8ES instead of B8ES for my bike? I believe the only difference is that the BP8ES are extended, so I would think clearance with the piston would be the only problem if there was one? If this is not an issue, my next question is what spark plug boots do you recommend?

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650ed
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Re: KZ900 Spark Plug Recommendations

26 Jul 2021 10:59

#852577

Clearly I do not understand. Why would you not use the spark plug that the folks who designed the engine recommend? Ed

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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Lebowski
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Re: KZ900 Spark Plug Recommendations

26 Jul 2021 11:48

#852581

Fair point. Because I happen to have a set of BP8ES available.

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hardrockminer
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Re: KZ900 Spark Plug Recommendations

26 Jul 2021 12:12

#852582

...and they no longer make the B8ES plug.....unfortunately.

I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.

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BCScott
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Re: KZ900 Spark Plug Recommendations

26 Jul 2021 14:10

#852588

ND W24ES are what I use in my KZ1000A1

Back in the saddle and loving it! KZ1000A1

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Nessism
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Re: KZ900 Spark Plug Recommendations

26 Jul 2021 16:21

#852599

W24ES & W24ESU are good if you can't find B8ES. Stay clear of BR8ES if you can since it has a resistor built in.

NGK plug caps are similar to the OEM caps. They have a resistor built in (thus the plug doesn't need one.)

The stock wires are copper core. Not suppression core, like car wires, which are resistance type.

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

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650ed
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Re: KZ900 Spark Plug Recommendations

26 Jul 2021 17:59 - 26 Jul 2021 18:03

#852602

wrote:

...and they no longer make the B8ES plug.....unfortunately.

Perhaps, but apparently the B8ES plugs are still available.

www.amazon.com/NGK-B8ES-Standard-Spark-Plug/dp/B000A8OVIY

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

Last edit: 26 Jul 2021 18:03 by 650ed.

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willemZ900
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Re: KZ900 Spark Plug Recommendations

26 Jul 2021 21:58 - 26 Jul 2021 21:59

#852610

I asked my local motorcycle dealer about the availability and production of the NGK B8ES. He knows nothing about it and can order as much as he wants (the Netherlands)

Last edit: 26 Jul 2021 21:59 by willemZ900.

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hardrockminer
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Re: KZ900 Spark Plug Recommendations

27 Jul 2021 04:04 - 27 Jul 2021 04:06

#852614

You may be correct Ed. But I've heard from several sources that they are stopping production. It's been discussed here. I wouldn't trust Amazon to sell NGK plugs made by NGK in Japan. Fake NGK plugs are known to exist.

Edited to add that if they are still made, and that's the OEM plug of choice then that''s what I would use.

I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.

Last edit: 27 Jul 2021 04:06 by hardrockminer.

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ayeckley
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Re: KZ900 Spark Plug Recommendations

27 Jul 2021 04:07

#852615

NGK plug caps are similar to the OEM caps. They have a resistor built in (thus the plug doesn't need one.)

NGK makes non-resistor caps as well in all the same angles as the resistor cap. Other than the part number etched onto the side I couldn’t tell them apart visually. I think Z1 Enterprises used to carry the full range of styles, not sure if they do anymore or not. Maybe it was Dennis Kirk?

1976 KZ900A4
1976 KZ900A4
1978 KZ1000A2
1983 ZX750 A1 aka GPz 750
1983 ZX750 A1
1973 CL350K4
1984 ZX1100 A2 aka GPz1100
1969 CT90
2006 Burgman 400

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TexasKZ
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Re: KZ900 Spark Plug Recommendations

27 Jul 2021 05:19

#852617

Z1 still lists the caps, but no non-resistor plugs.

www.z1enterprises.com/ngk-spark-plug-cap...ree-elbow-yb05f.html

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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TexasKZ
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Re: KZ900 Spark Plug Recommendations

27 Jul 2021 05:26

#852619

Claims to be an NGK crossover chart.

www.weeksmotorcycle.com/spark_plug.html#gsc.tab=0

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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