I have this issue of hearing a little tink noise when I press or pull on my road bike handlebars. Is it my threadless stem? It only happens when riding, the bike shop cant find the noise when they ride it? Its there, and it bothers me. Its not loud, just a little noise, when pressure is applied. Just started happening. This Bianchi is only 11/2 old and 1500 miles. Any ideas.