Recently rebuilt bottom end, he said he lapped the valves. And checked the clearances, moved a couple shims to get them all into spec, which I'm not sure what spec that it. Ignore the rotrex tension on the throttle blip.

https://youtu.be/vmm-rwBcqE0

https://youtu.be/TlvczX2mFoA

edit. New cam seals, valve seals, head cleaned, and valves lapped.

 

links are broken

 

Links work for my on PC, kinda sounds like lifter. how long ago was the work done, and what kind of oil/age.

 

100+ miles

On 3rd oil change, Royal Purple 5w-30, then Rotella 5w-40, I just switched to Mobil 1 10w-30 to see if there was a difference. It seems quieter with the 10w-30 and hot but still even after nice and hot it's too much noise I think.