I replaced the chain and sprockets on my 05 Sprint at 40.000 kilometres, approx 20,000 miles.
The Triumph chain is a X-ring as is most sports-touring bikes today.
Chain life all boils down to maintenance, IE lubrication, the way you ride, wheelies etc quick take-off from the lights, correct chain adjustment.
Having owned several Japanese sport-tourers, I don't think the Triumph is any better or worse, compared to other bikes, basically it how you us the right wrist on the twist gripe.
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