Most of the time, ballast weight is bolted directly to the seat. This can cause stress cracks to develop, reducing the rigidity of the seat. In due time this not only creates an unsafe situation but can substantially reduce the seat's ability to help you transfer weight. If in doubt, change it. It may be the cheapest way to reduce your lap times. But the aim was not to be the last kart on the grid. Weight ballast ensured that we all adhered to the same minimum weight. I would have loved to tell you that I pulled off a Sebastian Vettel in qualifying. ... > Catch Sanjeev Palar on STAR Sports' Engine Block every Monday at 10.30pm and catch highlights of his go-karting experience on ESPN. Minimum seat height without excessive bottoming to lower CG. Adjust seat placement and tilt for driver comfort aiming for a 55-60% rearward bias. Temporarily add ballast to bring kart to minimum weight aiming for 57-58% starting point rearward bias. Lower base weight will allow more adjustment with ballast placement.
Formula 1 cars are weighed during the Grand Prix weekend to ensure they comply with the minimum weight requirement of 640 kg. Teams use ballast to ensure the cars run at the minimum weight. Go Kart Weight Brackets - Long and Short - 3/4" weight bracket, 1" weight bracket, 1-1/8" weight bracket, 1-1/4" weight bracket, 30 mm weight bracket black, 32 mm weight bracket black, universal mounting brackets and more at Kart Parts Depot. WEIGHTS/BALLAST: All weights, including seat weight, must be bolted and double nutted. All bolt-on. Recently I got a friend to agree to taking turns karting with 20 pounds of ballast. ( 4, 5 lb. weights in our pockets) I weigh about 220 pounds, my friend about 180 pounds, so the ballast represents half the difference. We each took our assigned Karts through 4, 12 lap sessions, two with added ballast.