You might want to start with this for the concepts:
Compression damping for the front is at the flat-head screwdriver slot behind the fork legs; for the rear, it's at the top of the monoshock.
Rebound damping for the front is the flat-head screwdriver slot at the top of the fork legs; for the rear, it's the flat blade slot in front of the bottom linkage of the rear shock.
Maximum damping is when the adjusters are turned all the way clockwise. Turning them counterclockwise reduces damping with each click out.
Rider weight (in full gear) is a significant factor in determining suspension set-up.
The first thing you need to do is to find out what your settings are (i.e., if the previous owner has dialed it in for himself) by turning the adjusters in clockwise and carefully counting the clicks. Make a note of them and make sure they are equal when restoring the settings. If the former owner weighed approximately the same as you, you may not have to do anything.
Initially, you might just want to play with the rebound damping to reduce bounciness, especially in corners which is how my bike (same as yours) was when I first got it.
Depending on how far you are from the 150 pound rider for whom Kawasaki set up the bike, you'll have to think about adjusting pre-load.
What's wrong with the handling, by the way?