Sounds like something inside the case has slipped or gone past it's correct travel limit.
Is the kicker jammed "down" towards the ground or jammed "UP" towards the tank?
I think you are about to experience the ultimate pleasures of cracking your engine side case open.
Best you fix it before something else jams inside the case, I've always been able to reuse the old side case gaskets or used some liquid gasket maker on them so don't sweat finding another gasket.
Just drain your sump oil and remove a gazillion screws to remove the side case...have fun.