I am about to install new rings in my 1992 GSXR600. I have new OEM rings in a package from Suzuki. I know you shouldn't hone the cylinder walls if you have cast iron rings, but you are supposed to for chrome moly rings. Anyone know if the stock rings are cast iron? They have a dull dark grey appearance which looks like cast iron but it could just be a coating. I would expect chrome moly to be shiny as well, but that may not be true. Thanks.