The left hand (clutch side) is pretty easy, the hard side is the throttle.
There are 2 "notches" where the throttle/idle cable insert into the track and can be quite a pain. It took me about 30 minutes to change mine because of this. Just make sure everything is tightened back up again real good before taking off.
Also supposedly there is a little plastic item in the area that if you break it will cause your break light to stay on all the time until repaired. I was luck and did not break mine but know other people who have.