Experience has taught us that the safest and most enjoyable way to race is for juniors to race with others their same age and adults with other adults. The junior karts go 20 mph, adult karts go 40 mph, so we never race these karts together.
In certain instances, we may allow a parent to ride with a junior if no other junior drivers are enrolled in a race and the parent can safely fit in the junior kart. (Must be under 57 tall and under 175 pounds).