Without knowing the service history, as Les says, it would be prudent to at least do the rings. It's easy to say "just do the whole top-end", but there's no point replacing perfectly good parts that are within spec when you're not trying to win races on a street bike, and the cost of spares is ever-rising; some to almost extortionate levels! I guess it depends on whether (a) you are able to accurately measure the wearing surfaces, and (b) how comfortable you feel with the condition and history of the current components.
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Andy.
NSR-WORLD.COM
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