The story continues...
I removed the cylinder head top. Disassembled the rockers for inspection and found nothing alarming to my eye.
Rollers are tight, surface is even. Visual inspection proves they're not oval.
What do you guys think? Have I done all the checks to make sure rockers are in tip-top shape?
All things together before disassembly
Exhaust valves rocker
Intake valves rocker