on my 650 my belt slipt on the week end I have a mountain clutch kit for my outlaws on it but I have heard that my machine probably has a P650 belt on it because it was made in before december so if I change the belt to a P700 belt will I have to put shims in and can I do the shims myself and will that new belt help with the belt shuddering i,ve been having go ahead answer 1 or all, the more the merry R .