Top end rebuild 2 stroke 80cc

They say these bicycle engines are not actually 80cc, they're actually 60cc. So I don't know why they advertise them as 80cc if that's the case. Why not just call it what it is a 60cc. Anyway this is the second time rebuilding the top end since I purchased the kit from amazon in about August 2023. It seems like every 600kms or so it's in reed of a rebuild. I don't know if that's a long time or a short time, but on this tiny little engine it seems reasonable. If anybody reads this far down I even drove it all the way home 11 kilometers with only 1 piston ring and a severe lack of power. #80ccmotorizedbicycle #2stroke #ohhighbud #diyrepair #80ccenginecycle #redneckprojects