Graeme1198
XS650 Enthusiast
Rotor does seem to be testing OK. Are the slip rings clean? Very dirty ones can hamper output. The points of your meter probes may be getting through the dirt but maybe the brushes aren't.
I wasn’t sure about cleaning them. They had some black build up on them. I just used some electrical contact cleaner and a rag to clean them.
I wasn’t sure what you can use as I didn’t want to damage the surface or anything.