Quote Originally Posted by cbfb View Post
This thread's got nothing to do with it being loose, we're talking about wear. Specifically that the manual contradicts other sources.
Wear causes looseness. I don't get to hung up on a chain stretching, as long as it only has a bit of pull off the rear sprocket, a few mm or so.

It's the wear itself you should be looking at. If the chain is flapping like a wizards sleeve it can hop off the sprocket but I don't think yours is that flappy.

You need to check for tight (seized) links, broken seals, oval pins etc. Damage. Your chain coming to a sudden stop at warp speed is a real eye opener. And wallet opener for that matter. Other things open suddenly, too.

What are your sprockets like?

So yeah, don't get hung up on a load of measurements, check the condition, link by link.

My 2c anyhoo.