Hoss , Mountian Boss Hoss sells a rain cover made to fit the Boss Hoss. The main problem with hauling a bike with a cover over it is if the cover isn't secured so that no portion of it flaps in the wind , it will beat your bike to death . Meaning if the cover flaps against your paint or chrome the friction from the cover flapping against it can wear whatever it touches. Probably the only thing you can do to prevent this is to first cover the bike with soft blankets then the cover and still secure the cover as tight as you can all over with rope , twine tape etc.