Check out http://www.thumperracingusa.com/ and talk to Gary. They know the KLX very well and will set up your suspenders for your weight and riding. be prepared to tell him what your shocks are doing wrong for you.
I just sent off my forks and rear shock to them to get set up. They will respring and revalve for $225 for the forks and $230 for the shock, not a bad price and they will even redo it a second time for free if the first setup does not turn out to your liking.
Several other KLX riders have had them do work and they all were very satisfied, hence my decision to go with them. good luck