Now that a lot of the major problems with my bike have subsided, I am focusing on the lil things that have bugged me. One issue occurs when I am starting out from a stop. I rev up and start to let the clutch out like always. About a second after I have the clutch all the way out and the bike is moving along, I feel the bike give a brief jerk and it continues on its merry way. What is the issue here?