classic symptoms of the ball welded to the
internal rod.
had you been holding the clutch in too long at high speeds/rpms ?
Which leads me to wonder just how many balls are inserted without a liberal coating of white Lithium grease?
Chassis or bearing grease will not cut rubber here, White Lithium (Lithium Soap) is high melting point/high temperature and is the recommended grease for the clutch ball application.
If one is going to be working the clutch a lot at high revs (which is the norm when riding aggressively) White Lithium grease must be used toOk inhibit welding of the ball to a clutch rod.