I have the same problem. I purchased my Kirby 4 or 5 years ago, and it quit working a few months ago. It wasn't a big deal at the time, but I need to get it fixed now. When I called a local Kirby shop, I was informed that it was out of warranty.
This is bull, because the only reason I purchased the machine was because it was supposed to come with a lifetime warranty. I was not even considering paying the crazy price until they told me that it had a LIFETIME warranty. I was told that I could even drop it off a cliff, and send in the remains, and they would either fix it or replace it free of charge. I was able to justify a lifetime warranty like that, because that meant I would never spend another dime on a vacuum.
Now it is broken, and I'm being told that the lifetime part was complete bull. I'm contacting the corporate office, but if they do not honor it, I'm completely on board with this class action suit.