Try take some more pics, but from a bit further away so that the camera can focus properly. Or see if your camera has a macro setting for closeups. (There is sometimes a flower on the setting button for this.)
It a bit hard to see what is going on up at the top of the intake.
You need to find the cause of the meltdown before rebuilding or it will happen again.
Air leaks, blocked jets or running the float bowls dry at WOT can cause this.
I dont think new piston and rings will solve anything. The uneven running is most likely a problem with the carbs.
What does the smoke smell like. You may just be running rich on 1 side, it could be a coolant/tranny oil leak.
125 at sea level for a stock motor. readings much higher than that are probably from an inaccurate guage
Below 90 to 100 is time for a rebuild, or if there is a big difference between sides.
If both sides are 110 you are good for a while yet.
What does ported to 65 mean?
Are you running pods or airbox with/without lid and what is your elevation?
I would say that on a ported motor with an open airbox close to sealevel you are lean on the main jet.
No, if you take the fuel petcock off the tank you will see that there is a filter in there. It gets blocked fairly easily.
I would loose the inline filter as they often cause problems even if they look clean and flow well when you test them.
Are you sure that you are jetted right.
Rings are like $30 from a dealer.
If you are looking to save money with used rings you need a new hobby.
Whats next? Home made gaskets from cereal boxes.
Pilot jets may be too small or clogged. take em out so you can look through them and check they are clean.
Also check that the tube is on between the carbs and that the slides are in the correct way - cutout facing the air filter.
Look at the pictures, there are no TORS. You can see the carb cap in the second pic.
Try going bigger on the main, and get the clutch together so you can do plug chops to check jetting.