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.
I think no kart should carry more than 50 pounds. More than that requires some pretty creative ways to double stack lead blocks through 4″ long bolts. creating big levers on fiberglass seats.
I mount 2 lead bricks 10 pounds each to the back of the seat with required two bolts another brick to left side. a huge custom poured chunk under crotch of seat so that gets us to 40 pounds. and then squeeze little pucks were space allows. size 1 seat does not offer lots of area.
Trying to cover the entire range of sizes in each of these classes is not easy. Some kids grow like weeds and some do not, leading to huge differences between them. My 12 year old weighs in at 65 lbs with gear. That’s a far cry from Tom and Brian thinks Tom isn’t even big for his age! So I have my work cut out for me – as does anyone helping me lift his kart to the top of our double stand for the next few years.
But we can’t plan for only below 50th percentile kids to run in the junior classes, so we’re aiming for more fairness with the bigger kids. And to be honest, we’re still below most or all sprint series weights for these age groups, so there’s still more room to go up…