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

 

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.

 

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





-------------------
99 440ex
84 250r
few mods

 

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.