I use to own an 06 xtr and when i sold it it had 43k miles on it, another forum member bought it and has now sold it again with 46k miles. The bike was still going strong. It was starting to get a bit more viby and my local mechanic (who is a proper mechanic notjust a ehhh yea it needs this that and the other. ) said the main bearing felt as if it was on its way out at 43k miles, and would have cost around �300 + parts to strip engine, and replace main bearing

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Plough on