The cylinder bores are ceramic coated, you won't be boring those out, or likely need to. At 90k that wear is insignificant to the bores. Almost certainly you were using oil because of valve issues. Either out of spec, build up of carbon deposits, which is common in the Gen I bikes, or simply high rpm use a lot. Sustained running over 5k rpms on a Gen I tends to use some oil. It's blow by and some of it ends up in the air box. This is normal, not wear or indication of wear.
Unless the ring groove in the pistons has a lot of wear, just a set of rings and clean up the valve train and you're done. Anything else that isn't damage repair is wasting the money and time, IMHO.
I had my '12 apart at 83k miles due to a CCT failure. The bores were beautiful, but they wanted to replace the rings. Gen I rings are not a separate item, so you order pistons and get rings too or change to Gen II pistons and Gen II rings. Gen II rings are a separate part number, btw. I had one damaged piston and two damaged valves, fwiw.