My 1998 steel Serotta has the original stem, a 3T Status quill style, and the original handlebars: 3T Forma. They've worked great but finally I'm beginning to wonder if its time to change one or both of them. This season I've noticed that when going over bumps, there's an awful lot of flex in the bars and a creaking sound coming from where they are clamped into the stem. It is especially noticeable on descents when it can make the bike harder to handle. Even when standing still, you can grab the bars in the drops and if you pull fairly hard as if sprinting, a lot of flex can be felt. The fork is the old threaded style, but tracks true and absorbs shocks pretty well, so I'd like to keep it. Any suggestions, especially from someone who had the same experience with a well used set of bar and stem?