I was just gifted an 82 XJ650 from my father. It is the first motorcycle I have ever ridden, and I´m excited to get it back on the road. It needs work, but has very low miles. With only 8900 miles the rotor is really grooved, and needs to be replaced. Will a rotor from an 81 XJ or 81 XS fit this bike, and where can I find information like this? I also need blinkers, and mirrors, but the lists continues to grow.