Small hole in piston

[oi oi oi]

Any opinions about what to do about this and what may have caused it?

It's from my 50cc scooter. You can see a small hole forming in the top of the piston. I don't know how long it's been there.
The plug seems fine and not overheating, but some days the motor seems to get very hot. It's also just a very small area, not like I imagine overheating to be like.

I ride it a lot, and quite hard. Could it just be wear and tear?

I'm thinking to leave it for now and check in another 1,000 km or so, but if it's a 'change it now' situation, I have to do that.

Could be an excuse for a future 'hop up'.

[Penguin Knife Fight]

It's gotta be arcing and melting from the plug. Wrong plug installed? not gapped correctly?

[oi oi oi]

Plug is correct.
Looking at some new ones, they seem to have a hole / dimple too. I don't know why.
I'll keep watching it.

[Mike Cash]

Are they manufactured on a lathe? Could be to accommodate an end support during turning.

[ToraTora]

Yeah that's fine, they come that way. ;)

[oi oi oi]

Are they manufactured on a lathe? Could be to accommodate an end support during turning.

That sounds like a good possibility. The cheaper pistons have production marks still on them.

[oi oi oi]

Thanks for people's help. I was a bit worried when I first saw it.