03 blaster 240 vitos bb..

Have pic of piston ? That looks more like mechanical damage. Something bouncing around in there.
Deto would be more uniform damage. Look especially at about 6:30 from plug hole, big ole dènt.
 
Have pic of piston ? That looks more like mechanical damage. Something bouncing around in there.
Deto would be more uniform damage. Look especially at about 6:30 from plug hole, big ole dènt.
 
Have pic of piston ? That looks more like mechanical damage. Something bouncing around in there.
Deto would be more uniform damage. Look especially at about 6:30 from plug hole, big ole dènt.
Pictures are all up. On the beginning of the thread
 
Found a local guy that specializes in fixing blasters. 15 mins away from me. Picking my bike up next week. Decided to do a full rebuild. Hone cylinder new piston and planning on getting the 3mm vitos stroker to add to my 240bb kit
 
Didn't see pic of top of piston, but from other pics can see what's going on.
Just make sure there are no protruding sharp edges to cause hot spots causing detonation.