Originally Posted by
d_adams
Set it at 3/4" total movement from slack to tight with 30 lbs of pull upward tension. Use a fish scale. You should get mild whine on decel, but none on acceleration. The chain will move around no matter what, but I checked mine as it was set from the factory, along with actually checking Erik's personal SX a couple of weeks ago and they're set the same. You'd think it was way too tight, it's not.
Anything over 25 mm slack will eat into the slider and eventually the swingarm. I've done it.