Clicking noise from engine when hot

[rayOfDoom]

I am new here, so i would take the opportunity to say hello to all forum members and thanks for letting me in!   

Recently, the guy who services my Suzuki GS500 told me that i should adjust valves, since he discovered that on one cylinder valves were way out of spec (he said that bike was actually running on one cylinder?).
After he adjusted everything to spec i started to hear this weird "ticking" noise that definitely comes from the engine(not a vibration from gas tank, or something else).
Before this valve job there was no such sound...
But it only occurs when engine is running for some time and when is fully warmed up. Also when engine idles, sound is not present. It starts only when i rev up > 2k, and is a little bit more noticeable when engine is coming down to idle. I am not sure if this is normal sound, since some people say that valves can be audible... but still i never heard such a sound so i am not sure is it good to ride it like that.
Your advices/opinions are very appreciated. Thanks in advance!

I should also add that i haven't noticed any power loss or such, it runs good. Sounds healthy except of this...
Here below i uploaded some videos for you to hear, first one is where engine is cold and sound is not present

On these 2 videos engine is hot and sound can be heard.

I hope you can hear it, it is a bit subtile sound. Thanks for reading this i wish you a nice day! 

[HPP8140]

sounds like a healthy engine with clearance to me. higher valve clearance causes some ticking, which is fine.

[The Buddha]

Tight valves cause engine to not run in that cyl and are silent. That running on 1 cyl is a clear sign you had atleast 1 at 0 clearance.
The spec clearance on these motors is rather noisy at just up from idle. It reduces in audibility at higher revs.
Cool.
Buddha.

[rayOfDoom]

Thanks everyone for replying quickly... so if i understood correctly, this is how it should sound when valves are in spec? If so then i should not be worried about that noise...

[The Buddha]

I didn't listen to your video, but ask your mech what the clearances he set it to in actual numbers for each valve.
Then put your head with your more sensitive ear 2-3 inches away from each valve and listen to it at the loudest rpm.
That would now give you an index of how a 0.3 vs 0.5 etc etc sounds. Remember exhaust will sound different from intake anyway but you will be able to correlate sound vs clearance anyway and can hear it as it wears tight (less noise) and wears loose (more noise).

Cool.
Buddha.