About time someone said under load. You have to have the rear shock compressed in order to see how much slack the chain has as if you were riding it. 3/4 " under load should be plenty.Sevulturus wrote:About 3/4 to 1.5 inches depending on the bike. I believe that is under load. Meaning if it's 3/4 of an inch deflection while the back wheel is off the ground (to adjust) it'll probably be to tight once you sit on it, and the swingarm moves tightening the chain.
If you check and adjust it with no load on the bike, you run the risk of doing damage to your sprockets etc.