Intermittent crankcase pressure issues

Pretty good pix now actually. Hmmmmm #2..... something is not right here IMHO. With what are fairly low miles? I do see some crosshatch left, but such a distinct ridge at the top should not be there with limited miles. Cross hatch angle seems OK. More perplexing are the radial grooves going around the cylinder walls.... those should not be there at all.

Looks like teringer may have nailed it if you used that ring pack PN... those rings are 1/16" tall rings for 1st and 2nd rings.... the standard KB167 call for 5/64" tall rings. PN 3910AM8-xx. Short rings won't seal.