The BST40 is designed to self compensate for altitude changes, the KTM factory is 60 miles from the Alps where they test their motorcycles like the Adventure series.
You can play with this map to see the relationship between the factory at Mattigofen and the Alps.
'02 KTM 640 Adventure-lowered
"On the road there are no special cases."
Cormack McCarthy-The Crossing
The faster it goes the faster it breaks.
And high performance=high maintenance.