Assuming you remembered to switch to AC when reading the stator output I'd say you've found the culprit. I'm thinking offhand that you should be seeing 60VAC or better at 4500 rpm, but I lack a manual in my motel room so I can't say that with absolute certainty. Pretty easy fix (maybe Pinwall will have a stator) and you can check that pesky pickup coil sensor gap for an 0.8mm gap while you're in there. New side cover gasket, too, unless you're uncommonly lucky.
