What do these spark plugs say to you?

  • Zaddict
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What do these spark plugs say to you?

20 Aug 2022 10:34
#872540
They’re iridium plugs. Prob haven’t checked them in 10K miles. Some carbon deposits. Running rich?

1990 Zephyr zr550 B1
Wiseco 615cc kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter...

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  • Mikaw
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Re: What do these spark plugs say to you?

20 Aug 2022 10:44
#872541
Plug range to cold, over rich mixture, short ride not getting up to temp, large gap. Factory plug is a D8eA, I’d try factory NGK plugs. 
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
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Re: What do these spark plugs say to you?

20 Aug 2022 11:28 - 20 Aug 2022 11:29
#872546
Top row,  second from right
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Z1000J2 somewhat modified!
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Last edit: 20 Aug 2022 11:29 by Warren3200gt.
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