Yamaha Banshee YFZ 350 66mm +2mm Wiseco Pro Lite Pistons NEW UNUSED. I was told my Athena cylinders were 66 mm, it wasn't until six months later when I got around to installing that I found out that they are 68 mm and my pistons are too small.
I took these out of the package, put them onto my crank arms, attempted a fit, but it was way too easy, so I stopped and measured. These pistons are brand new, never ran. They come with the circle lips, the wrist pin and the rings are already installed. Seriously, these are brand new and ready to be installed.