Most people don't use covers because they block view of your brake lights and license plate.
That' said, Pro makes a decent one. The best is from Coverstore.
https://www.the-cover-store.com/vehi...rs/bike-covers
I own the Weathertite Prime from Coverstore. It is more than anyone would ever need but I would not use it on a vehicle for the reason stated above and because it is relatively baggy and would flap in the wind and get ruined over time.
-Tim-