Seemed like every time I got back from a ride on the 650, the chain needed a little tightening, and it didn't stop. Bought the sidewinder chain---no more readjusting after each ride. My 11 year old has a new XR100 doing the same thing. Any one else out there having this problem with a fairly new chain? My adjustment method is to load the suspension to the tightest point on the chain & then dial in the desired slack.