I'm sure many folks will jump in here and bash my reply (perhaps rightfully so). I too was shocked to read that when I got home with my 03 200. I am good mechanically, and have a long past with high performance 2-stroke watercraft. I can not imagine how the KDX can kick up these shape burrs in the ports that need to be removed, since this situation never occurs in the break-in of any of the many two-stroke engines I've owned. I am very meticulous and anal with all my equipment, but this just seemed too far for me. I asked my dealer, (I take care of all my own stuff, but this particular shop is fantastic) and they laughed when I brought up the tear down. I put mine through the recomended heat cycles, changed the fluid, then rode. Just my (unqualified) opinion.