2003 Honda 400 ex spark plugs

is there a difference in the performance on a NGK vs. CHAMPION spark plug? it is on my 03 400 ex.

Originally Posted by BIGT400EX is there a difference in the performance on a NGK vs. CHAMPION spark plug? it is on my 03 400 ex.

I would not put champs in a Honda...use:

Spark plug Standard: DPR8Z (NGK), X24GPR-U (DENSO)
For extended high speed riding: DPR9Z (NGK), X27GPR-U (DENSO)

NGK is the plug most recommended by Japanese engine manufacturers. That is what I always run.

Originally Posted by BIGT400EX is there a difference in the performance on a NGK vs. CHAMPION spark plug? it is on my 03 400 ex.

to me there is a big differance i have 400/ex i use to sanddrag with i use ngk dpr8z. champions dont hold up under the heat produced by the 400/ex if you notice on longer rides your motor oil will get lower due to heat evaporation produced.