bandit600 wrote:I have a 1999 Suzuki GSF600S that's due for spark plug replacement. The manual calls for NGK CR9EK plugs which are multi-ground plugs. The NGK website also says that the NGK CR9EIX Iridium plugs can be used on my bike. My questions: Are iridium plugs worth the extra 10 dollars for a set of 4 (I'm no MotoGP racer) and does it matter that the iridium plugs are not multi-ground ( no adverse effects ) ??
Thanks for any help!!
I went from standard copper plugs to platinum plugs on my bike and noticed that it became easier to start and ran a bit smoother. Plus the obvious increase in plug life with platinum plugs.
A lot of guys I know saw similar benefits switching up from the NGK OEM copper plug to the NGK iridium plug. At the very least, the plugs will last many times as long as the standard ones. At the best, you'll get a noticeable increase in performance.
For as rarely as plugs need to get replaced, $10 is nothing. I'd go for it.
Check out this guy who did exactly that:
http://www.sportbikes.net/forums/showth ... p?t=301788
"So far I've only taken a short run with the new Iridium plugs, but the bike definately feels smoother. Some people have reported an increase in fuel economy as well, and I'll be keeping an eye on that on upcoming rides. If there was any more power, you wouldn't notice, but it definately is smoother running."