TFT Posted January 14 Share Posted January 14 (edited) I just pulled one of the spark plugs to check its condition, there was a lot of carbon on it. The plugs I have in there are NGK CR9EHVX-9, I probably installed them at least 15 years ago. They have been discontinued and replaced by NGK 6216 CR9EHIX-9 Iridium IX spark plug. Is there any major difference? I'm guessing it would be a good time to change them seeing as I have access to them. Edited January 14 by TFT Quote Link to comment Share on other sites More sharing options...
superhawk996 Posted January 14 Share Posted January 14 They're discontinued but still widely available. That said, I'd go with the iridiums anyway. Quote Link to comment Share on other sites More sharing options...
Zero Knievel Posted January 15 Share Posted January 15 Ditto. Platinum plugs were harder to find years ago. When I saw iridium served the same purpose (anti fouling), I just started buying iridium plugs. Quote Link to comment Share on other sites More sharing options...
RXX Posted January 15 Share Posted January 15 Don’t waste the planet’s incredibly small supply of this vital metal on a spark plug for a recreational toy. Use platinum if you can. We should hoard it and use it only where it supports our nation’s vital interests. 1 Quote Link to comment Share on other sites More sharing options...
fizzy Posted January 15 Share Posted January 15 Presumably, this is the same bike that you are rebuilding the carbs on in a sister thread. This has never happened to me personally, but I understand that if you foul an iridium plug, it is very difficult to bring it back to life. In case your carb rebuild fails, I would get her running properly with the old plugs, then switch to iridium. 2 Quote Link to comment Share on other sites More sharing options...
XXitanium Posted January 18 Share Posted January 18 https://www.davidsilverspares.com/CBR1100XXV-SUPER-BLACKBIRD-1997/part_10376/ Did not see a spark plug wrench though. Quote Link to comment Share on other sites More sharing options...
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