Front and Rear Suspension revalve and proper springs.
Tall seat
Sub mount for steering damper-raises bars for long hours standing on the pegs, as well as keeping you from catching the damper in the throat.
Steering damper.
Make sure hand controls are clean and well lubed.
Proper hand controls/levers positioning.
Proper bar positioning.
Good grips-glued and safety wired.
Good tires with heavy tubes, and psi/kbar set properly.
Testing-don't be afraid to try different settings on suspension, levers, and bar positioning to get the most control and comfort out of your bike. Once you have a good set up it will work good everywhere.