What's the thread on our spark plugs? I goofed up the hole on my rear cylinder and need to clean it up with a chase I guess... :-(
I know this is an old thread but just to say that I've been happy with my Denso Iridium spark plugs. I'm sure they add a bit more throttle response when I give my ride a hand full overtaking.
I think my plugs are Denso Iridium Power IU24