Just generic stuff, and not much of it. Can't remember the brand, but it was one of those so-called grey "metal" epoxies, with an operating T° of about 150. I didn't case all the windings. Used captan tape for that, and then just put a few blobs to secure the whole thing. I'd do it a bit more professionally now, if I had to do it again! Anyway, it's still working, although I have now manged to get a replacement alternator very cheaply, so will probably switch back to that. I prefer not to have a transformer that might get a soaking in a puddle on the enduro. However, I currently seem to be collecting the parts to build a 610 SM, I'd have no qualms putting my makeshift patent stator into that!
Incidentally, if anyone knows what the type of the 3-phase connector is please let me know! Since it only has 3 pins I checked to see if it is from the same Sumitomo series that the coil & excitor wires use (the 4 pin one), which I mentioned above, but it is not! Quelle surprise... I'll add a photo tomorrow.
Stumbled onto this thread, and remembered spending a lot of time figuring out my CDI issues http://www.cafehusky.com/threads/01-610-spark-issues.10109/
Great thread and work, shame this website isn't more active. I think if you posted this at advrider.com you would have got a lot more interest and input. I was actually searching for the generator casing gasket and your pic of yours came up, but decided to read the whole thread, not that I could understand most of it!