Okay, I'll be the first to ask. When do we know exactly when to get a new chain? I'm at 10,900 and have tightened it once. The rear sprocket looks fine. I've only used 80/90 gear oil with a brush every so often. I know, I know, every 400 is recommended, and I try to stick within that. I used a tooth brush and some dish soap the other day and gave it a thorough cleaning, and reapplied oil. I don't know what any of the warning signs are on the chain itself.
I know it's different, but I've used chain saws all my life. The only time the chains were replaced was when you couldn't lengthen the bar any further (chain is stretched as far as it could go). I've been under the impression so far to use this same logic with a motorcycle chain - i.e. change it when I can't tighten it any longer.
As always, input is appreciated!