Obviously modular, or system or flip-up helmets are not as safe as full-face helmets otherwise they would be used in racing. The reputable UK SHARP helmet safety ratings system to which Mark refers shows modular helmets with similar ratings as full face helmets, although less than half received the full five stars.

Why Modular helmets are bad?

Along with the additional versatility modular helmets provide, there are a few cons. They tend to be a bit heavier in comparison to most full-face helmets. The hinge system and commonly included internal sun visor add weight.

Is it safe to use modular helmet?

4) Go for maximum protection. There are modular helmets that are tested as both full-faced and half-faced helmets. ... But despite having two homologations, riders are discouraged from wearing modular helmets with the hinged bar flipped up while the motorbike is moving at high speed.