Which spark plug do you use on your 440EX?

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Feb 10, 2005 | 01:19 PM
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I have used a Champion 8809. What spark plugs are other people using on their 440EX's? I don't want to run too hot of a plug.
thanks
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Feb 10, 2005 | 01:46 PM
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Which spark plug do you use on your 440EX?
you should run a NGK DPR9Z. this is one step cooler than stock and is recommended by the piston manufactures that i have talked too.
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Feb 10, 2005 | 06:53 PM
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Which spark plug do you use on your 440EX?
yea the NGK DPR9Z is what i use in my 440ex its a colder runin plug like cal said its better for the engine so u should prolly stick with that plug





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99 440ex
84 250r
few mods





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Feb 13, 2005 | 12:40 PM
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Which spark plug do you use on your 440EX?
Use the stock NGK, champion plugs are junk. I fouled out my ngk, so i picked up a champion and i had more problems starting my rancher then it was worth. Got another ngk when i got home and it starts easy like it did before.
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