Borrow a good battery and hook it up, start bike and check voltage to ground on the 3 wires going into r/r. Should be 60-80 v AC. (Check your book to make sure) on each wire. Check dc voltage across wires coming out of r/r, should be 13 or so v dc. If you got nothing on the 3 wires its your stator, if you have nothing on the 2 its your r/r. If both are good you roaches your battery. Anyone please correct me if this is wrong, I've never done this on that particular bike but I figure if it has a 3 field stator and a solid state r/r it shouldn't be much different than a Honda or a Yamaha.