So tonight when riding my GPX250r to a friend's place I hit a pothole. Apart from being really unpleasant everything seemed to be fine though. On the way home I did start to notice every little bump a lot more than usual and after getting it home I realised there was almost no rebound in the rear. It sinks down like usual but takes ages to return to normal height when I get off the bike where it used to spring right back up again. There is no damper adjustment on the springs so I can't change anything there. Is this time to replace the rear shock? Is there anything else I should be worried about? Also is it dangerous to keep riding it like this? Also for what it's worth, the front suspension seems fine.