It’s not a machismo thing – I’m seeking information from parents who have walked this path before – been here, done that. My son has driven shifter karts a few times and absolutely loves them. He drove them well, good control and dealt with the speeds well within his limits. This is not a father pushing his kid into something he’s not ready for – this my kids’ idea!! I’m in the information gathering mode only , in order to make the right decision.