I use a Nelson Rigg defender cover when I have to store mine outside. Size M I think? It is the one I used on my previous bike(zr-7) and it fits fine. It was pretty cheap and gets the job done. It has never scratched the paint or caused me any problems. It does need a fresh coat of waterproofing though, as the sun has taken its toll on the finish and color. I would still recommend it though. I have owned the super cheap covers before, and the stitching and material quality is much better on the Nelson Rigg model.