KZ900 Spark Plug Recommendations

Lebowski
Topic Author
Offline
User

26 Jul 2021 10:35 #852574 by Lebowski

KZ900 Spark Plug Recommendations was created by Lebowski

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?

Thanks

Please Log in or Create an account to join the conversation.

650ed
Offline
User

26 Jul 2021 10:59 #852577 by 650ed

Replied by 650ed on topic KZ900 Spark Plug Recommendations

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)

Please Log in or Create an account to join the conversation.

Lebowski
Topic Author
Offline
User

26 Jul 2021 11:48 #852581 by Lebowski

Replied by Lebowski on topic KZ900 Spark Plug Recommendations

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

Please Log in or Create an account to join the conversation.

hardrockminer
Offline
Sustaining Member

26 Jul 2021 12:12 #852582 by hardrockminer

Replied by hardrockminer on topic KZ900 Spark Plug Recommendations

...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.

Please Log in or Create an account to join the conversation.

BCScott
Offline
Sustaining Member

26 Jul 2021 14:10 #852588 by BCScott

Replied by BCScott on topic KZ900 Spark Plug Recommendations

ND W24ES are what I use in my KZ1000A1

Back in the saddle and loving it! KZ1000A1

Please Log in or Create an account to join the conversation.

Nessism
Offline
Sustaining Member

26 Jul 2021 16:21 #852599 by Nessism

Replied by Nessism on topic KZ900 Spark Plug Recommendations

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

Please Log in or Create an account to join the conversation.

650ed
Offline
User

26 Jul 2021 17:59 - 26 Jul 2021 18:03 #852602 by 650ed

Replied by 650ed on topic KZ900 Spark Plug Recommendations

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.

Please Log in or Create an account to join the conversation.

willemZ900
Offline
User
Z1B 4 ever

26 Jul 2021 21:58 - 26 Jul 2021 21:59 #852610 by willemZ900

Replied by willemZ900 on topic KZ900 Spark Plug Recommendations

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.

Please Log in or Create an account to join the conversation.

hardrockminer
Offline
Sustaining Member

27 Jul 2021 04:04 - 27 Jul 2021 04:06 #852614 by hardrockminer

Replied by hardrockminer on topic KZ900 Spark Plug Recommendations

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.

Please Log in or Create an account to join the conversation.

ayeckley
Offline
User

27 Jul 2021 04:07 #852615 by ayeckley

Replied by ayeckley on topic KZ900 Spark Plug Recommendations

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

Please Log in or Create an account to join the conversation.

TexasKZ
Offline
Platinum Member

27 Jul 2021 05:19 #852617 by TexasKZ

Replied by TexasKZ on topic KZ900 Spark Plug Recommendations

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

Please Log in or Create an account to join the conversation.

TexasKZ
Offline
Platinum Member

27 Jul 2021 05:26 #852619 by TexasKZ

Replied by TexasKZ on topic KZ900 Spark Plug Recommendations

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

Please Log in or Create an account to join the conversation.

KZR's Bikes of the Month for 2024

KZ900 Spark Plug Recommendations

If you like KZR Please consider making a donation. Thank you.