Originally Posted by Kouba

For the best performance set the race sag (amount of vertical movement of
the rear axle FROM no weight to bike weight plus rider weight) at 3 3/4"
with the KLX2 links, 3 1/2” with the KLX3 links, and 3 1/4” with the KLX4
links. *Sag is set by tightening or loosening the rear spring preload with the
nuts on top of the spring. Sag is measured with the rider in full riding gear,
standing on the pegs, and including all carried items. If the links are for
lowering purposes ONLY, race sag is set at 3.90 inches, and will lower the rear
of the bike .75" with the KLX2 links, 1.125" with the KLX3 links, and 2.0" with
the KLX4 links.