i would drop the suspension out and loosen the track to realese the presure on the jack shaft.i would order bearings for both sides its not that exspensive,and while i was at it i would replace the speedo pin that slides in the shaft on the clutch side.everytime i've canged this bearing without changing that pin i'm tearing it apart the next weekend to change it.the pin is only 6.75 at polaris dealer.changing the bearings is fairly easy and straight forward.should only take 2 hrs tops to do.i have never removed the entire chaincase housing to do it,only the outer cover.once the shaft is out its really easy.as far as clutch side just remove the rear clutch plate should be a half inch bolt.and the 3 little bolts you see remove and those bearings will fall right out,actually there will be 2 allen screws in the bearing. if you have any more questions just ask.