My rear shock wore out at 18K miles. I went ahead and replace both front and rear shocks and springs! The reason this bike came with such modest suspension...was to keep the price under 20 grand. I did the install myself. However, I just had all the seals replaced under warranty including the head gasket, two leaky intake manifolds, one cracked intake maniford, a transmission output seal, a timing chain cover seal, some new fuel lines, and an oil breather line. No more warranty....hope it's good for another 25K miles!!