Low compression, pics of my piston

[peonpete]

Hello. I have had trouble with my scooter for the past month, the issue began around a month ago. The problem is two-fold, for one, it began to hit a high RPM right off the bat [7500], then it would within seconds drop down to 5k and slowly build up from there to 6200 rpm and stay there. Secondly, it began to "burp", where it would lose power then gain it back again repeatedly. Tt sounded like a air - fuel issue and i checked the carb and it was fine. Now we come to a few days ago, the problem got worse and the scooter refused to start up. I checked for spark, check. Cleaned the carb out and the jets, and also checked gas.

All were good, so i bought a compression tester and the compression was awful [52 psi]. I pulled it apart tongiht and looked at the piston, it has black carbon deposits all on the top of it, but the worse bit are the scratches all over its side...Is this the reason for the bad compression ? I admit that once or twice it did run out of oil due to a leak, which probably caused the scratches on its side. I have pics attached to. If it is the piston should i just get another kit [I have a 100cc kit currently].