Actually, you don't have to pull the cables out, valve cover will come off. Undo at the grips, just pull back enough to give yourself some slack.......... rotate sideways at the throtttle cam.
When doing my valve check I was shown if you undo the right side handle bar you can gain enough slack to do just that! Just protect the tank from getting bumped! Oh yea, if the tank is off it won't get bumped just maybe dropped!