Especially if it's a "wet-sump" motor, where the oil supply is stored IN the crankcase, rather than in a separate container elsewhere on the machine (dry-sump) ... just conjecture -- is the subject plug here out of the crankcase of a wet-sump engine? Would the condition of this magnetic oil sump plug be most feared on a dry-sump oil bottle, rather than out of the bottom of the crankcase of a wet sump motor? Most all BMW's, modern Ducati's, Honda's, etc. would be "wet-sump", whereas most previous-generation British (Meriden-built Triumphs, Small Heath BSA's, Nortons, etc.) and '70's Honda CB 750's, would be "dry-sump".