I don't think replacement is any big deal.  You take the tank off, then replace the cable.  Make sure the there is enough slack in the cable to allow the lever to return to the lowest position......so the release isn't touching the rocker arm when the bike is running.  When you rotate the lever up with your finger you will feel when the slack is gone and the release begins to touch the rocker arm inside the head cover (unless the engine has stopped in a position where the cam is holding the exhaust valve open....exhaust stroke).