Well after too many years of not owning a quad I have finally came across one. Spent $100 for it. It is missing the top end (jugs, head, pistons). I have an old set of jugs laying around from my previous bike. The problem is I blew a piston in the one side. Back when it happened I figured I would just upgrade so all I did was some self honing to the jugs and put them on the shelf. 3-4 years down the road I am wondering if I can get away without boring them out. They both measure under 64mm, roughly 63.87. Just wondering by looking at the pics if anything jumps out or screams "get them bored." Thanks