just was wondering what to run on my k8 600 i got about 4,600 miles on it was gonna change plugs since they are 6 years old, guy at local pats store says that stock plugs are NGK non iridium plugs but in the haynes manual says some use iridium so wtf. and please don't want to hear about how their are millions of other posts about this i didn't find any that relate to me. and i don't care to sit on here for hours to look for one post,