Yes, that crack in the rotor winding is not good. That rotor appears to have had a long and hard life. It may be working normally when the engine is cold, but as the engine heats up, all or part of the rotor winding may become open or shorted out.
Those slip rings could use a little clean up with some fine emery paper.
You live near Mailman, don't you? I suggest you borrow the alternator rotor from his bike, install on your bike, and then do a test run. You do need the proper rotor removal tool, and a manual impact tool to remove the 2 stator screws.
Those slip rings could use a little clean up with some fine emery paper.
You live near Mailman, don't you? I suggest you borrow the alternator rotor from his bike, install on your bike, and then do a test run. You do need the proper rotor removal tool, and a manual impact tool to remove the 2 stator screws.