Mothballs or dryer sheets does the trick when in storage or just get a cat to hang out in the garage for a while.
How about you name your bike "Jiffy-Pop"? OOOOH so sorry but I had too. lol
To avoid future problems put some metal screen mesh over the air hole. Some 2 part epoxy works great to secure it without having to put a bunch of rivets or screws.
I was thinking of "Orville" as in Redenbacher