I would clean it off with carb cleaner. Actually the best cleaner would be electronic cleaner from Napa. You could probaby get it at any place that sells the CRC Brand of arisol cleaners. It is made for fine electronics. The stator is designed to run in oil. so it is going to be chemical resistant. I would not put it in the oven ethire. The stator is made to get hot from engine oil but the plugs on the end of the wiring harness are not. You would probably melt them.
Here is a link to the stuff I am talking about.
03 Limited Edition Raptor Hot Rods 720cc Stroker, Megacycle x-4 cam, Sparks 6X Big Core Exhaust, 35mm Keihin FCR's.
97 Yamaha Banshee - F.A.S.T. Dune Ported 4mill Stroker, CPI Pipes, Keihin PWK33's, Direct Drive Lockup,
158 main jets, CEL Needles on the middle clip, 45 Pilots.