I'm trying to dial in the adjustment on my primary chain. Did a stator swap a month back and I am trying to dial in the tension. I was hearing a knock and I found about 1 inch of play so I tightened it a bit down to 1/2 inch of play, while cold. I am getting a much milder knock on occasion now.

My question is: when testing for play how much force should be applied to the chain? Obviously I am adjusting it thorough the primary inspection cover, so all you can get in there is a digit. I can press it till it stops but then, if apply more force, I can press it up some more. Depending on how hard I push, the slack can be measured differently.