Now I'm curious if there's an actual tension/deflection number for #25 chain runs. I've always succeeded with "Good and Tight" while being careful to keep the sprockets as closely aligned as possible.
I'll see what I can find for objective numbers.
EDIT: Found something!
http://www.diamondchain.com/frequent...-questions.php
About halfway down, under "How is proper chain tension measured, and why is it important?"
Also, this whole page is full of good stuff regarding chain.