Spark plugs instead of b7es

Spark plugs instead of b7es 21 Apr 2022 06:23 #865873

Bobdudeman Topic Author Offline User Posts: 18 Thank you received: 0	Morning everybody. Looking for a cross reference to NGK B7es for my KZ650 1978. any input would be awesome, ty! The b8es are too cool.
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Spark plugs instead of b7es 21 Apr 2022 06:27 #865874

Warren3200gt Offline User Posts: 1446 Thank you received: 655	Denso W22es is the way to go. Heaps better than ngk. Z1000J2 somewhat modified!
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Spark plugs instead of b7es 21 Apr 2022 06:37 #865878

Bobdudeman Topic Author Offline User Posts: 18 Thank you received: 0	Thanks man, is there anything I can get locally at say AutoZone or advance Auto parts today? I don't think they carry that brand
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Spark plugs instead of b7es 21 Apr 2022 06:40 #865879

Bobdudeman Topic Author Offline User Posts: 18 Thank you received: 0	Is that the w22es-u?
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Spark plugs instead of b7es 21 Apr 2022 06:40 #865880

Warren3200gt Offline User Posts: 1446 Thank you received: 655	Wouldn't know, I'm in the UK. Z1000J2 somewhat modified!
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Spark plugs instead of b7es 21 Apr 2022 06:41 #865881

Warren3200gt Offline User Posts: 1446 Thank you received: 655	wrote: Is that the w22es-u? Yep. Z1000J2 somewhat modified!
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Spark plugs instead of b7es 21 Apr 2022 06:47 #865882

650ed Offline User Posts: 15344 Thank you received: 2828	I've been using ND W22ES-U spark plugs in my KZ650-C1 for the past 20 years and have found them to be superior to the NGK plugs I previously used. Ed 1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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Spark plugs instead of b7es 21 Apr 2022 07:29 #865884

Bobdudeman Topic Author Offline User Posts: 18 Thank you received: 0	Thanks Ed. Looks like I never checked my recent plugs numbers. Looks like they gave me NGK BR7ES vs the B7ES. They are already sorta fouled and wet. Is that due to the R rating ?
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Spark plugs instead of b7es 21 Apr 2022 08:06 #865888

zed1015
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wrote:
Thanks Ed.

Looks like I never checked my recent plugs numbers. Looks like they gave me NGK BR7ES vs the B7ES. They are already sorta fouled and wet. Is that due to the R rating ?

Very likely..
The R stands for resistor.
You should only have one source of resistance which should have been in the plug cap.
Adding a second resistance will weaken the spark and increase the chance of fouling.
If you continue to use the BR7ES you should fit non resistor caps.

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Spark plugs instead of b7es 21 Apr 2022 08:51 #865891

Nessism Away Sustaining Member Posts: 7280 Thank you received: 2673	I've read about people removing the resistor from OEM plug caps, thus allowing use of resistor plugs. Ed Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0 www.kzrider.com/forum/forum-index/faq-wi...owner-things-to-know 1981 KZ750E2 www.kzrider.com/forum/11-projects/604901...z750e-project-thread
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