2000 ZX6R bike manual suggests: CR9E NGK site says CR9E or CR9EIK (iridium) is there any advantage to running the iridium plug? is there a plug i could use that will perform better? all i know about the plugs that came out of the bike is that they said "11" on the side of them and i'm assuming they are a race plug maybe? i'm misplaced them so i don't know what the ID number is on them.
cr9e or cr9ek will work the ek plug is a dual electrode and takes up more room in the combustion chamber not much but very thing counts
