WHat PLug is best to use.

[HondaRacing23]

I have a 426 EX and a hot cam stage 1 should i use the DPR8Z plug or DPR9Z plug? I know the 9z makes the bike run cooler but just need to know what one would be better.

[Bigg Pimpin]

I tried the 9's in mine this weekend and it just does not seem to run as well as with the 8's. I am going back to 8's today.

[HondaRacing23]

yea thats what i noticed also i think im going to stay with the 8's as well

[400exguy]

why not try a hotter plug instead of a colder one????

[cals400ex]

je highly recommends the drp9z plug. that is all i run. yes, it may be a bit harder to start and run a bit different when the bike is cold but i think that is the best plug for the bike. why would you runa hotter plug? :huh