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Message: [QUOTE="mtngoat, post: 90272, member: 18818"] ochster, Wow! I'm a little new to thumpers and never considered that a valve seat could wear enough to practically offset/exceed the lash adjustment (.004/.005, which I thought tends to increase as valve components wear, ultimately causing noise if not re-adjusted). And, as the seat wears, wouldn't it increase lash? Maybe I'm looking at this all wrong, but I'd like to know, since I do the valves on multiple XRs. Thanks. [/QUOTE]