You can call it what you like but you should just focus on the sag you get when sitting on the bike from fully extended, this sets the shock to its correct working range for your body weight, if you find that you are a bit heavy and getting to the limit of your adjustment then you should consider a stronger spring, unfortunately their is no adjustment to set the fork preload and the KLX is a bit spongier than the D-Tracker but this is a good place to start, after you have achieved that you can start playing with your dampering adjustments, set them from standard and go from there and if your getting confused go back to standard and start again, what you should try to achieve with that is to get the bike when bouncing up and down on it is to have the front and back going up and down at the same rate, you will need a friend with a good eye to sit back and watch what the bike is doing while your bouncing on it, you dont want the front dipping down before the rear or the rear dipping down before the front, the same applies for the rebound you dont want the back kicking up before the front and visa versa, this takes a lot of messing around to achieve but if you get it right its a great advantage while cornering, the bike squatts down evenly through the corner, hence better handling, when i was racing a lot of guys would throw good money in to engine performance, i used to consentrate more on handling, that way i could carry more speed through the corners and of course go faster than them. Suspension is a science of its own and their are plenty of web sites that can give good tips on the effects of changing dampening settings but at the end of the day its a bit of trial and error, make your adjustments in small incriments 1-2 clicks at a time and only 1 adjuster at a time, find a piece of road you like and spend an afternoon testing all variations, go from one extreme setting to the other just so you can feel what effect it has on the bike so you can know for your self what each adjustment does another good tip is to take notes while testing so you have some reference to go back to.
John