Spark Plugs RS Motor

kyzer

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I have heard that some people are running another spark plug in there sleds other then stock..Some say it adds HP..What are they??? I am looking for feedback for these plugs, do they run hotter, void Yamaha warrent, do they foul easier, what about gas mileage , why are they so much better then the stock plugs???????????????
 
After reading the post about these cr10ek plugs sitting lower and the last thread on the plug getting all carboned up and the possibility of stripping the head when taking the plugs out, forget it! I will stick with the stock plugs thank you! Has anyone tried to remove their plugs yet that have had them in for a few thousand miles?
 
I've took mine out a few times with no problems.I don't know how someone could strip the head.For the cost it's a no brainer upgrade.
 
The CR10EK plug does not sit into the combustion chamber any further than the stock plugs. The stock plug actually sticks about .004" further into the chamber.
 
If you don't want to spend as much but still want the boost and a quality plug try the denso version.


http://www.sparkplugs.com/
NGK CR8EK $6.95ea = Denso U24ETR $3.27ea.
NGK CR9EK $6.95ea = Denso U27ETR $2.24ea.
NGK CR10EK $6.95ea = Denso U31ETR $5.78ea.
 


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