The more questions I ask, the more confused I get! OK, so this service is mentioned in the Kawasaki shop manual at 15k miles. It MAY be needed, but maybe not. Last mech. I spoke to said, if it was needed NOW, the bike would be making noises that were out of the ordinary. Well, that is not the case at this point. A local dealership wants a total of $600 to do this. They say first off, it has to be inspected. If a valve clearance is needed, it costs more. OK, so lets say I have them check it, and it is NOT required at this time. What do I do, bring it back in another 15K miles to check it again, or wait till I hear something strange? Sound like one of those catch 22 deals. Please, what, if any, experiences has anyone else had with this? I mean, oil changes and such I get. You don't not change the oil until the engine is about to exlode. You do it to avoid it. This is always a required action. Same with air filters, tire pressure, etc. But this valve deal is, as George Carlin used to say, could be meat, could be cake.