125-200cc Sons WR144 top end

Finally got into my boys WR144 to see just WHAT shape she is in.
prior to my son purchasing the bike, we have NO idea how many hours are on it.
Since purchase he has put maybe 4 hours total run time.
Pump gas with NO ethanol
Amsoil at 40:1
Lectron Carb specifically for the WR from Kelly

exhaust valves are amazingly clean - no carbon, move freely etc



Head had nothing on it


Piston = well we have the makings/signs of an exhaust bridge seizure




Exhaust Side in the Jug:




Intake side of the piston



Cross hatch is good on the rest of the bore, but you can just feel the scoring on the exhaust side with a fingernail.
Ring end gap was right at .013


Are light seizures normal with these WRs?

Next step now is taking her out to first over and start fresh -

Thoughts?
Input?
Observations?

is it Eric Gorr time?


Thanx!!

Scott