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Spark plugs
- Dvbish
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07 Jul 2020 07:13 #830001
by Dvbish
Spark plugs was created by Dvbish
Newbie here. Sorry if this is a repeat question. Are NGK BPR7ES plugs ok to use in a 1076 Kawasaki KZ 400? What would an optimal plug be? Thanks for the help!
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- Warren3200gt
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07 Jul 2020 09:56 #830013
by Warren3200gt
Replied by Warren3200gt on topic Spark plugs
B7es or preferably denso w22es. Bpr7es have an extended electrode which will have no benefits for your bike.
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- 650ed
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08 Jul 2020 09:14 #830090
by 650ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Replied by 650ed on topic Spark plugs
Why not simply try using the spark plugs that the manufacturer (Kawasaki) said should be used? I suspect the folks at Kawasaki knew a thing or two about Kawasaki bikes. :whistle: Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- Warren3200gt
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08 Jul 2020 10:12 - 08 Jul 2020 10:15 #830097
by Warren3200gt
Replied by Warren3200gt on topic Spark plugs
That's a page from the original manual ed. I think they revised it to b7es and w22es for the whole range after the first editions.
Last edit: 08 Jul 2020 10:15 by Warren3200gt.
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- 650ed
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08 Jul 2020 12:44 - 08 Jul 2020 12:45 #830108
by 650ed
You are correct! Thanks!
Looking at www.kz400.com/TechnicaldataFrameset.html it appears that Kawasaki changed the recommendation to NGK B7ES or ND W22ES-U starting in 1978. Kawasaki made a similar change to the KZ650 spark plug recommendation after the first edition of the KZ650 manual. It makes me wonder if the earliest recommendations were based on Kawasaki test riders' track experience vs regular street use. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Replied by 650ed on topic Spark plugs
Warren3200gt wrote: That's a page from the original manual ed. I think they revised it to b7es and w22es for the whole range after the first editions.
You are correct! Thanks!
Looking at www.kz400.com/TechnicaldataFrameset.html it appears that Kawasaki changed the recommendation to NGK B7ES or ND W22ES-U starting in 1978. Kawasaki made a similar change to the KZ650 spark plug recommendation after the first edition of the KZ650 manual. It makes me wonder if the earliest recommendations were based on Kawasaki test riders' track experience vs regular street use. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Last edit: 08 Jul 2020 12:45 by 650ed.
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