$35, and fold in your mirrors (or remove) and you're good to go. Let a little air out of your tires if you feel like it.
Your first time out, ask a not-noob to show you the "line" around the track, and explain protocol for passing and exiting, as well as what to do if someone crashes. Maybe watch a few laps before you head out. Ask anyone out there on two wheels for advice, people are generally happy to help out.