Need help on top end rebuild

[rpduc]

Hi all,
Would appreciate some advice on condition of my top end. The last time I had a 2T top end off there was no talk of Nikasil, power valves, etc.

I yanked the head to measure squish in preparation for the RB head mod and after seeing condition pulled the cyl. She's been rattling a bit too... I think I'm in need of some piston /cyl work. Both piston and cyl show some scoring and the wrist pin has noticeable wear. I can't detect any end play in the big end bearing. I think it's a Wiseco piston in there now. It looks nothing like the new-in-box Vertex TM250 piston from with the batch of parts that came with the bike. They are both marked 66.33mm.

How does one decide if a cylinder needs replating or maybe over-boring? How much wear can be fixed by replating?

Any experience with Millenium Technology as a replating service?

TIA for any advice.

Ross