As soon as you start to race, you will see the wall at the left of you. Jump at that wall right before you hit it, and you will be on the other side! And do it again, jump over the wall before you hit it where you see the starting line. BUT! Make sure when you jump you must land ON the starting line! Then you will be on your 2nd lap already! Do this two more times, and the race will be finished in no time!