As rings get thinner and thinner break in becomes more critical. The 1/16 1/16 3/16 ring pack that just 25 years ago was the “race” rings that couldn’t be used on the street (what a lie that is) is now dinosaur technology. Way too heavy, limited bore comfortability, less sealing and more.
Also, as ring technology moves forward, ring materiel gets better and better, allowing thinner rings still. That means your honing must improve. Bore geometry changes. And certainly, break in procedures and what oil used to get through break in becomes all the more critical.
My junk W2 build will get at the thickest a 1mm, 1mm, 3mm ring pack. Maybe an .09, .09, 2mm pack. It depends on how much of a hero number I might think I want.
