Race sag too small - Reduce preload. Very Harsh ride over ripples - Reduce compression damping. Bike wallows - Increase rebound damping. Rear jacks up too fast on braking - Increase rebound damping. Rear end chatters exiting slow corners - Increase rebound damping.
Bike kicks off ripples or bounces on bumps - Increase rebound damping.
Reduce rebound damping.