I recently restored a QT50 - all shiny and looking new. I also have a yamaha SH50 Riva Razz (scooter) about the same size.
I keep them in the garage where allot of woodworking/sawdust is happening, and I piece of plastic tossed over them.
I am thinking it might make sense to get cheap covers, and have looked at Amazon and seen "small" motorcycle covers that are about 20" longer than needed, and also seen gas grill covers that are about the right size.
Has anyone found a cover for bikes these size that they like? I'd like to stay sub $30. Nothing special, won't be used outdoors.