Well the dear old XR100 has finally decided to cause me problems. i thrash it a fair bit and ihave managed to stretch the cam chain, but it still needs to be used till i can get it fixed/fix it. so i need a few pieces of advice: 1) what can i do to minimise the damage until it is fixed (there is a serious vibration at around 3/4 throttle) 2) how much would it cost me to get it fixed. ive always done my own maintainance but since it will be sold in the next year or so it would be advantageous to have it done professionally. cheers Uni/.