WR cylinder
Closeup of stock reliefs

KR Cylinder
Factory closeup
of stock reliefs

KR factory relief shapes
Taken from HD specs manual

WL cylinder relieving
steps & pictures

Perfect example of what should NOT be done: relief parrallel to gasket area.

KR factory relief dephts
Taken from HD specs manual

NOS ULH cylinder with factory relief. From Dotman's website.