Ensure your wheels are on the correct side and they are locked into the drive position. The side of the buggy is determined looking from the rear of the buggy. If this is correct, your front wheel may need adjusting. Please refer to manual for adjustment instructions for the Zip X1, X3, X4 & X5 models. If your buggy is a Zip Navigator or Zip Navigator AT, please refer to the attached PDF or video for motor trimming instructions. Please refer to the attached PDF for more information Watch the tutorial video