
Magnetic Rotor has come loose in camshaft taper. Socket head bolt has broken loose or was too long and bottomed in camshaft before securing rotor.
After making sure bolt is proper length, a drop of BLUE Loctite can be used to secure the screw.
Never use RED Loctite in this application.
copyright ©John Healy November 2007 Special thanks to RF Whatley for comments and suggestions