For a few months, when I apply my front brakes they do not stop the bike smoothly like my rear brakes. The best way I could describe the front braking are they stop the bike "jerky." The jerking motion is enough that I feel the front shocks compress during the jerking. I have an appointment next week with a mechanic but would like to understand some possible causes so that I can make a better decision for the repairs. Thanks for your assistance.