Some bikes have plated cylinders but the CB450 does not.I heard that some motorcycle cylinders are made or coated with something ( Nickel maybe) I can't remember what. To the point, it can not be honed normally. Would my cylinders have this stuff on them, or be made of it? Bike in question CB450 K5. On a side note, can anyone help me find standard rings for the CB450 pistons?
As for rings check the dealer and accessory shops, internet searches, etc. I'm sure you can accomplish that yourself. That's what the rest of us do.