Well. the Kawasaki Premium Outdoor Bike Cover Extra Large Size with top box (Part no:039PCU0018) arrived this afternoon. I compared it to my Oxford Stormex from my old bike and they are very similar. Even with an MRA touring screen at its fullest height the curtain of the cover fits like a glove over the front wheel, and its plenty wide enough to cover the panniers and rear wheel. I would say it's a little large for the 650, but no part of the cover drags on the ground (although maybe I've only ever covered naked bikes I'm used to seeing a closer fit).Let's see how long it lasts compared to the Stormex which started to come apart at the seams after 2 years. Hope this is of some use to anyone looking for a cover.