I was planning on getting only the piston rings. When hitchcocks says the piston rings are +20, are they saying that they will fit the stock pistons and a bore of 70mm +20, or that those piston rings will fit an oversized piston?
Typically with car engines you use the stock pistons and just buy oversized rings when doing an overhaul, so this is the knowledge im going off of. Is it different in this situation? As I said, i'm new to engine work on bikes, so I'm unfamiliar with the process.