Spark Plug Defect?

  • daveo
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Spark Plug Defect?

18 Oct 2023 10:31 - 18 Oct 2023 10:47
#890608
The ceramic post on one spark plug easily spins around on the body.  There are no other visible irregularities.
Should the spark plug be used, or rejected as defective? 

Short video below:

photos.app.goo.gl/vtzhU9eKyA96jLKP9


[img
1982 KZ1100-A2
Last edit: 18 Oct 2023 10:47 by daveo.

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  • Nessism
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Re: Spark Plug Defect?

18 Oct 2023 11:25
#890610
Looks bad to me.  I'm no expert, though.

One thing, those plugs are resistor type, so be sure that you are not using resistor plug caps or resistor wires when running them.
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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  • Wookie58
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Re: Spark Plug Defect?

18 Oct 2023 11:39
#890613
I suspect you will loose compression through there and it may even blow the centre out if you get excited, should be "crimped" tight 
1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca
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  • sf4t7
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Re: Spark Plug Defect?

18 Oct 2023 11:39
#890614
In 45 years, never seen the ceramic spin like that.  Throw it away.


 

Scotty

1974 Z1A
1015
welded Z1 crank
Andrews 1X Cams
Delkevic 4 into 1
Superbike bars
530 conversion
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  • Nerdy
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Re: Spark Plug Defect?

18 Oct 2023 13:34
#890626
I would ask the manufacturer: they should be able to tell you for sure.

If it's wrong/defective, they might also want to investigate if it's a one-off or if there was a bad batch.
1979 KZ400 Gifted to a couple of nephews
1967 Yamaha YCS1 Bonanza
1980 KZ440B
1981 Yamaha XT250H
1981 KZ440 LTD project bike
1981 GPz550
2013 Yamaha FZ6R
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  • Kelly E
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Re: Spark Plug Defect?

18 Oct 2023 14:33
#890628
Could also be a counterfeit plug.
The Rust Bros. Garage Collection
1974 Honda CB 550 K0
1975 Honda CB 400F Super Sport
1977 Kawasaki KZ 1000 LTD
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
1990 Moto Guzzi 1000
1994 Kawasaki ZG 1000 Concours

And more
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  • TexasKZ
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Re: Spark Plug Defect?

18 Oct 2023 16:02
#890634
I would want my money back.
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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