Had the rim on my 81 200 start leaking recently. Checked the tire after putting slime in it only to find out it was the rim where it bolts together. No leaks on the tire. I looked in the manual and they show an o-ring there? I got the wheel off and the rim separated a little but the tire is still on rim. Should I dismount the tire to fix this? Can get my hand in there but not quite sure how it seals....so asking suggestions on the usual fix for this problem? Thanks in advance!