My rings were fine, no excessive blow by, one of the heads needed some work, so decided to reseal the whole top end, which obviously meant the cylinders had to come off. Leaving the piston in the cylinders keeps the rings oriented correctly with where the are already worn in. And like I said earlier, a much more experienced Buell mechanic suggests not doing rings unless new cylinders are used or boring the original cylinders. Apparently the forces of these engines tend to oval out the cylinders more than most other engines, which the rings wear evenly into as the rings and cylinders wear together, and just throwing in round rings in an oval cylinder doesn't seal as well as using the original rings.