were you referring to the one clean piston in the pic? i think i took a rag to the thing before taking the picture, it was consistant with the other pistons etc, the spark plugs were a little light on the front cyl's and darker on the rear cyls. in any case, based on those pics, do you think that the head is decently useable? i didnt have any oil on the plugs at all so i think the rings are decent