get a liter of Coca Cola and a bottle of decent bourbon.
Get a bowl. Pour enough coke into the bowl to cover the stator and let it soak.
While the Stator is soaking, mix the bourbon with the rest of the coke and drink.
While your drinking, install a EuroMoto Electrics alternator kit in place of the original Bosch system, no more worries!
In the unlikely case that you remember the stator, take it out of the coke, throw it away, and give the coke to the dog.