I just wanted to get the opinion of others. I will be installing a freshly honed cylinder on my bike and was wondering if anyone would ever think about using rings that have around 100 miles on them. I was going to buy new ones to install with the new cylinder, but a guy a work suggested I just use the ones I just installed into my old cylinder which have about 100 miles on them. I don't know enough about how quickly the rings break in, or if they wear to the old cylinder and won't seat properly to the new cylinder. The old cylinder is out of round at the top (and out of spec in the X direction). But if people suggest I just use the 100mi old rings on this cylinder then I'll save myself $50 bucks. Otherwise I'll just buy new ones like I had orignally planned. Thanks.