...hi, I dismantled the engine due to one of the main bearings is worn out.
I have 2 questions that may be any of you can help me out?

1- The bearings do not say anything but I am not so sure if they are both CN, due to some International vendors have both in C3. Both are ball bearings and in my opinion did not lasted too much. All we know that these engines really last.
I do not know which to buy and I do not know any scooter guru to ask.

2-where are the damaged balls? I did not find any or pieces. Could be in the exhaust?

---This is my first 2T engine dismantle ever.