A question to the OP. Where do you store your bike? Does it not have a fuel tank?
As for storing fuel in plastic bags; DON"T DO IT. The static electricity that can be produced from a plastic bag can be the ignition source for a violent explosion.
I posted a story here a couple of years ago about a motorcyclist who was badly burned when he ripped tape from his fuel tank. Static discharge has been responsible for many fires especially where a fuel source like gasoline vapor is concerned.