oh yeah, oops
taken from gamefaqs:
It is really not certain whether or not he is easier than he was in
MK2 to defeat. Like Motaro, he is a sucker for combos, though not as much.
You cannot do the wait in the corner tactic from MK2 on him(i.e. wait in
the corner, Kahn charges in, you uppercut) as your recovery time is longer
now. Should Kahn ever miss with his Shadow Knee, he is left perfectly
open for an uppercut. You can also get in a few projectiles before he
starts throwing projectiles back at you. As in MK2, if Kahn ever taunts you
or laughs, pummel him.