just replace them now...My tank was riding forward on the frame, and the rear grommet had cracked all the way through, exposing the head of the bolt...all i needed was for that bolt head to slam through the bottom of that tank. Also, it was warn enough that the frame was butted up against the tank and shattered all the paint off the front of the tank - all the way to the metal. You can get them from bdpp pretty quickly, and they're real easy to replace. Get the rear of the tank seated correctly first, then push the tank forward onto the front grommets. I highly advise taking the handlebars off however, because its a pain in the ass to get the tank off without scratching it, and its much easier to just take the two bolts out of the bottom of the handlebars on the triple tree. I severely damaged the paint on my tank trying to take the short cut of not taking it off properly.