The Bell KC7 Carbon - An Ultra-Lightweight Children's Karting Helmet The KC7 Carbon CMR2016 Helmet is the youth karting version of the RS7 which combines advanced F1 styling, an innovative air intake system for maximum ventilation, and leading-edge aerodynamic performance. This extremely light helmet weighs 1095 to 1130 grams depending on size which is great for reducing neck strain in high-intensity racing. We keep it well stocked as your source for the most sought after karting gear on the market! Get the Look: Bell - KC7 Carbon CMR2016 Youth Karting Helmet Bell - SE07 2MM DSAF Shields - Fits KC7