Swooping mine 15T to17T was easy, well for me;
knock back locking tab, undo retaining nut, mine was hand tight ! Slacken off rear wheel adjusters, move wheel back , lift chain off sprocket, keep chain on drive shaft then withdraw sprocket, replace with new sprocket, loop chain on to sprocket, replace locking tab ( new recommended, but felt mine was fine after flattening) tighten retaining nut, bend tab to lock. Adjust chain to recommended tension, mine has plenty enough on adjusters. Do this in 1st gear, lock wheel with rear brake if sprocket moves when removing or tightening. Replace chain / rear sprocket if worn,
but I am sure you know this
2003 GS Dakar
BMW Panniers, top box, tank bag
+ loads TT stuff that came with it!