While I do not agree with the 2 year rule, I am pretty sure it was brought about by someone getting sued. Too many things in this country are brought about by frivilous lawsuits or the threat of one.

We have a lot of safety protocols at work that are just plain dumb, but were brought about by people sitting in offices worrying about how to limit company liability in case of an accident that may never happen anyway.

You guys can always cut some of the sting of changing belts by selling them to dirt racers. Those guys will buy them because they don't have a time limit on them.