MB2 Go Kart Racing Parties for Kids, Adults, Bachelor Parties, Bachelorette Parties and more. We offer go kart racing parties for all ages, we have go karts for juniors and even faster karts for racing the adults. Our Adult Go Karts go up to 45MPH and safety is our priority. All racers will watch a quick instructional video, purchase their headsock and be given a helmet to race go karts on the indoor go kart racing tracks.