There isn't a problem with the Stators on the 920's that I am aware of. There is a procedure in the Clymer's Service Manual for checking the stator with an ohm meter. Set the meter to Ohms x 1 scale. Check each white wire against the other. The reading should be 0.5 ohms, if it is anything else, check the wire from the coil to the terminal and the terminal itself and make sure they are OK. Then take one lead of the meter to a good frame/engine ground and check each of the white wires. You should not get a reading. If you do get continuity, then the stator is bad and must be replaced.
The battery light is powered by a sensor in one of the cells in the battery. If the battery is low on water, the light will come on. It doesn't indicate a low charge in the battery, just insufficient water in that cell. You could also have a bad sensor. Check the sensor wiring if your battery is full of water.