Zamp RZ-48Y Carbon: Children's Lightweight Racing Helmet The RZ-48Y is a lightweight children's helmet that does it all! Featuring both the CMR2016 and SFI24.1 safety ratings, this helmet is perfect for both kart racing and quarter midget racing. Available in 3 styles with color matched interiors- Get it at RacingDirect! Get the Look: Zamp - RZ-48Y Youth Carbon Helmet