[EricH]

Originally Posted by Greg Woelki

How much stretch should be expected in belts and chain?

I'm not entirely certain with belts--I don't have much experience with them.

For chain, it depends somewhat on the chain, but it's not altogether uncommon to need to adjust the chain length by up to a half-link (usually by tensioning the chain instead of removing a half-link). Adjusting by more than a half-link is a lot less common, and probably means somebody didn't calculate the chain length right in the first place.