Most kids, probably more so in JA, are well over the minimum weight a year or two before they reach age 15. When we started in JB and my son was age seven, we had 60 pounds of lead on the kart. Our last year in JB we had none. In JA this year Tom was 9 pounds over minimum with no lead and he is only 13. At 5’6″ and 115 pounds, he’s not a big kid. I think most parents will find themselves in the same boat. If the weight limit was not raised, your son or daughter may find that they will have grown themselves out of being competitive and still stuck in a kart for another year or two.