05 prairie 360 the back end is moving when i drive alittle bit not much. im guessing this is bad swing arm bearings? how long can i drive on bad ones?

 

its not a good idea to run on bad bearings, it could ruin the tube area where the bearing is held. this area is not replacable. the shaft is repairable but probably expensive.
think about sealing the area behind the bearing or making it greasable. there are olso seals on the shaft pieces i believe. do a search on this subject. its not that difficult to
work on.