so the center section loosens up, or do the sides separate, or both?
have you checked to see if you have any broken tabs and/or missing tabs? rubber grommets dryrotted?
not sure if it's an option for you or not, but every sportbike I've owned has had an aftermarket "race" or solo tail on it... putting one on your F2 would surely solve your issue(s), if your equipment (fasteners included) aren't malfunctioning.
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