I use a WPS brand half-cover...it's an XL...has it's own little stuff bag...8" x 7" x 3"...fits over upper fairing, engine, instruments, seat, side covers, saddlebags, and Givi Maxia trunk...down to about the bottom of the license plate...has a couple of elastic loops to fasten around the footpegs, etc...protects from sun and dust...and keeps things "out of sight...out of mind"...
HTH...