Yup, guaranteed for 5 minutes or 5 feet...uh....errr...unless you start it, then no warranty. They did the same thing with the 1999 KX250 when they found that the exhaust ramp was hitting the piston. Provided a replacement exhaust ramp assembly for the owner to install. I had already modified mine with a grinder, so still have the replacement in the tool box.
Glad to see Kawasaki is working out all the bugs before I have to decide what the boy will ride next year.
Rick