Re: what did you do to your motor bike today?
That's a deck and polish, yeah. Decking is where you sand the crap out of the head so it's flush with the main body. It makes the gasket seal better and gives a compression bump.
I would think the ding in the middle would have been a piece of metal removing itself. lol
It might be cheaper time wise and safer to just buy a new head. Then deck that one.
2 WHEELS: '11 Huffy Good Vibrations, '11 Skyhawk GT5, 44t, CNSV2, NGK BPR7HIX, Bosch wire, shutupexhaust, 26x1.75kevlar tires, Tektro C230's, new stupid Bell chain