How fast does a racer have to go to clear the famous LaRocco's Leap? During the 2018 RedBud Motocross round of the 2018 Lucas Oil Pro Motocross Championship, we busted out our Bushnell radar gun and clocked 450 class racers as they came out of the corner and charged up the face of the jump. For how big the distance is, the actual speed needed to make it to the downside might surprise you.