Hey guys... so this technique has been in use for many automotive applications on oil pans, but I thought I'd share the perfect ones for e50s and I'm sure they'd work for any other moped.
My clutch brace at one point was slightly grinding my clutch bell causing some metal dust to get into my tranny fluid. Instead of all that metal sloshing around in there, this magnet will keep it down by the drain plug and not in you r crank bearing, clutch bushing etc. God forbid you have any metal on metal grinding, but in case you do, this trick will minimize wear.
Here are the perfect sized magnets.
Here is how perfectly it fits under an e50! Magnificent!!