I dont know why you would want to, i find champions alot better than NGK, i do run NGK in mine but only because she calls for it, in my dads XCR 600, champions lasted alot longer and they give you sign they are dying out.
i switched from regular ngks to the iridium brand. theyre ten bucks a plug and have a needle point tip on where they fire, suposed to be a better plug for starts and combustion , seem to work good :bounce:
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