Firstly, I have to say I am no suspension expert. Alot of people I meet around the scene claim to be , but often when they say what they have had done to their bikes all I hear is the sound of money being parted with!
Get yourself a workshop manual, understand what all the various 'clickers' (the adjustment screws etc ) on your bike are called, and what their function is ...IE rebound, compression etc...notice I don't say what they 'do', this will take time to understand, try not to listen to others too much, instead learn yourself.
In the manual should be a basic table of what to adjust to compensate for an unwanted behaviour from the suspension. Take a photocopy of this page and take it with you to the track (saves the main book getting stinky)
Start with all the clickers in the middle. Then set your race sag (search this forum, there are loads of threads) Then assuming you are not v light , or v heavy you should be able to experiment with changing the various adjustements, in conjunction with the manusl and record the effect.(if you are way heavy or way light you may have to change the springs front and back to bring you within the range that the adjusters on the suspension can cope with) ALWAYS write down what you do and what the effect is, I cannot emphasise this point enough, it is always too easy to fiddle with a screwdriver at the circuit, and lose track of which way you went with which adjuster....
Many people say only move the clickers in small incriments, whilst I agree with this, you may need to move them more coarsly to get you in the 'region' then finely as you near perfection!
I have never has suspension revalved..so before you ask I can't comment on this, I'm sure it improves things, but at the mo' I can't afford it so have to work with what I have. (My son has just gone to 125's, he is v light so I have had to replace springs etc...and we just got the suspension close over the weekend...although It was very wet, so the conditions plus the weight of mud on the bike made final tuning impossible, we'll get there soon though!)
Good luck...Sully