03-05-2012, 09:37 PM
Bearings inside the swingarm may be bad. I had this same problem and just fixed it today. I had some real akward grind/squeak revolutionary type noise in the rear end and also had that 1/4" play. I was suggested Swingarm bearings.. Got the bike apart and tried tightening the pivot bolt to make sure it wasn't loose and it still had play... So I took the spare Swingarm I had and put it on, no play. No play whatsoever now. Hope it fixes the multiple issues it was causing.
Hope this helps. I have an 03/04 636
Hope this helps. I have an 03/04 636