How do you adjust the middle chain on a 1996 sportsman 4x4?

At the front of the center chain in an essentric . there are two bolts that need to be loosened . once they are loose take a hammer and a punch and gently tap the eccentric .one way will loosen chain the other way will tighten chain . the center chain needs to be as tight as you can get it .tighten the bolts and then adjust the front chain as tight as you can get it . there is also an eccentric for the front chain . then with the usual riders weight on the machine tighten the rear chain . with the weight on the machine leave one to one and a half inch slack in chain in the center of chain .