Looking for help on my top end build

2008 Rzr 800, 1300 miles
Using about a qt per ride
Compression about 170 on both sides
Carb loaded with crap

Trying to figure out my first top end.

1. I’m unclear whether my cylinder is bad or not.
2. It has been suggested that my oil loss is my valves not piston rings? Gap in the picture is at least double spec I believe. Valves seem to be fine with no visible signs of pitting or wear. They feel smooth. Can’t tell if valve seats are bad or not?
3. I figured I prob should just replace pistons and rings since it’s apart. There is some wear on the pistons but I don’t know if that means they are bad or not. Nothing to obvious to me on sight or feel that makes me think they are bad

Hopefully the pics are good enough to see what’s going on.

Thanks for the input! I really appreciate it.

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