My rear belt drive sprocket has sheared its inner spline. My bike´s an original 2004, and there was a recall on this part. However, 5000 miles later the new sprocket sheared. A third sprocket and a new shaft were installed. 5000 miles later sheared again. This time they replaced every part involved, washeres, bearings, spring clips, the works. 2000 miles so far. Kawasaki covered all the repairs. I´ll stick with a company that backs its products.