The short answer: Undo the 2 screws holding the right hand switchgear together, and remove the right hand bar end weight. The throttle tube slides back and forth now, and may let you do what you need to.
However, if you want to remove it you almost certainly won't have enough slack in the throttle cables so will need to raise the tank, pop the air box off, and loosen the throttle cables where they attach to the carbs.
Jambo
Edit: Started responding, then wandered off to sort something else before submitting. SVDragRacer is correct