I am an hour and a half from my bike at the moment so I cannot get pictures but I will give you a step by step the best I can.
#1 Take off bar end mirror/bar end weight or any other thing holding your throttle tube on the bar.
#2 Unbolt the housing that holds the throttle tube in place. 2 bolts on the back on the on/off and starter control. Top one is short Bottom one is longer.
#3 Unhook the throttle cables and slide the throttle tube off of the bars. (The grip will still be on the old throttle tube at this point.
#4 Use an air compressor to shoot air between the grip and the old throttle tube and slide the grip off.
#5 Use the same trick to put the old grip on the new throttle tube.
#6 Put it back on the bars and insert into the housing.
#7 Connect the throttle cables and put the 2 bolts back into the housing that clamps it around the new throttle tube.
#8 Adjust the grip so that it is in the correct spot and is not rubbing on the bar, no sticking throttle, etc.
#9 Cut the end of the throttle tube off so you can fit your bar end mirror (if you have one, if not skip this step)
#10 Replace the mirror or bar end and ride.
That is as simple as I can make it. It is such an easy process I don't know how much I can say that.