Are you referring to the old legend about putting a small bell on your bike to trap evil spirits? No, I'm not kidding. The legend went that certain bad spirits were attracted to motorcycles. Same thing as the Gremlins that attack other mechanical devices such as airplanes. A small bell on the bike attracted the spirits and then trapped them inside the bell where they went crazy fom the ringing and fled the bike. It was said that the bell was most effective when given to the rider by a loved one.
My son always said that my brain is a vast storehouse of generally useless information. I think I just proved it.
John