Working on an 03 Ultra. It is making a grinding noise in what seemed to be inside the primary, and the charging system is not working. I disassembled everything to get to the stator & rotor. The primary oil smelled like burnt electrical. I believe the stator is bad, the thing is I can't see anything that would have been making the grinding noise. The spline on the rotor is fine as well as the magnets. My question is can I safely run the engine with everything out of the primary to see if the noise is still there.