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Iridium Spark Plugs


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From the Maintenence post:


Denso DCPR7EIX (IXU22) single electrode Iridium

Denso DCPR8EIX (IXU24) single electrode Iridium


What's the difference and (therefore) which is best of the two choices above for the 1200RT?


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Morning Hugh


The difference is in the heat range. Unless things have changed in the last year or so Denso didn’t recommend the thin electrode iridium in the BMW boxers. You might call or E-Mail the Denso tec line to see if things have changed.


Some people are using the NGK DPR8ix-9 Iridium but as of a year ago I don’t think NGK officially supports that plug for the 1200 hex either (again call or E-Mail the NGK tec help line)


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John Bentall

Hi Hugh,


I went to an evening talk at my local IAM group recently. The chap from NGK said that Iridium plugs were developed for long life car applications where the plugs are in for 40,000 miles or 100,000 on some American cars. If you are going to change every year or so the cheaper ones are perfectly OK.

Up to you really...





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My (now sold) 06 R1200GS had the NGK iridium plugs from the 600 service point until I sold it with 28xxx miles. They were never changed and still looked like new after all those miles.

Just sayin'


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DCPR7EIX is a NGK plug # not a Denso.


I've been using the NGK DCPR7EIX in my '05 R1200RT for more than 120,000 miles now with no problems. The bike now has 214,000 plus miles and still going strong. At 90k miles, I put new DCPR7EIX's in even though the old ones looked very good.

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I just purchase and installed a set of "single electrode" from BemmerBone Yard for my R1200RT. I was not sure and called them, they said it is OK. Well have rode the bike about 600 miles and no problems.

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Evening Ron


A good plug to look at is the NGK DCPR8EKP as that is real close to the original NGK DCPR8EKC that BMW calls for in the manual. It is also the correct heat range as the NGK DCPR7EI is a slightly different heat range than specified. The NGK DCPR8EKP can go for as low as $7-$10 online and are even available from some discount auto parts stores.


As far as I know the OEM DCPR8EKC is only available through BMW dealers here in the United States.


The NGK DCPR8EKP is a dual ground plug (that's what the K designation means) same as stock with nickel (same as OEM).


The only real difference is the end P as that means a platinum tip (extends electrode life) but not the skinny thin tip of the EIX.


The NGK DCPR8EKP is the plug I personally use.


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