The throttle grip is not hard to do , it is pretty easy . If you are replacing the handlebars you will have to take off the outer fairing & disconnect the wires to give you enough slack to unplug the the connection inside the handlebar , that is what I had to do on my RG .
Changed mine on an 09 RK and the hardest thing was unplugging the midline connection for removal. My fat fingers don't do those water tight plugs well. Go slow and you'll see it's not that hard.