i pulled the tire (rear) off my 06 xr650l for the first time and i noticed that the bead/rige where the bead sets about 3 to 4" from the valve stem on the rim is worn smoth. any help appreciated! is this a bad rim? ever since I put the new tire on the bike handels funny. i cheked the search but could not find anything. the front also seems to slip out. not wash just slip. is it because i have the "deathwing" on the front and kt966 on the back? this is my first time changing a tire did i do somthing wrong. please help!!!