You are the first that I have read that picked up this little issue...
I have commented on how my XTR was reluctent to turn in
a few times....
I made mine better by droping the forks though the clamps 15 to 20mm..
The Xt's are set up to be quite stable & track stright on lose surfaces..
Droping the forks though reduces the rake & trail..
But they are not quite as stable.. but no more than any other dirt bike..

Another thing that dosn't help is not having the sags set right , so the
bike is rideing high on its suspenion with the riders weight on the bike..
alot of people think it needs to sit near the top of it's travel.... is incorrect..
Suspenion needs travel in both directions...sag should be 75/80mm
"1/3 of the travel" for a XT when seated on the bike..

__________________
Harley Davidson..
The easyest way to turn gasoline into noise with out the side efect of horse power...