Title pretty much sums it up, I've got a 72 CB500 that's been in a barn in new england for 5 years. Trying to get it road-worthy, tires go on this weekend. While the rear is off I was investigating the sprocket and chain, and well .... how do I know if they are still good? And, if they *aren't* good, what's going to happen if I keep using them anyhow? Sudden and violent failure, or gradual decrease in performance? Which is to say: will I i die, or will the bike just stop going forward, or what?