Noise from valves on 08 yzf450

hey my yzf450 08 (10-15 hours) started today to make a noise from the valves only when hot anyone got any idea what it could be...?

Have you checked them yet?

My 08 is loud but its been like that since the day i got it

yeah my 08 seems to be louder then most engines as well. I just checked my valves and they were in spec so you are probably fine.

haven't checked them yet...but mine haven't said the noise all the time can it be that they need adjustment....

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