At few helmet versions (15%) there is due to construction type at chin partie area because of extremely deepended visor or far protruding operating lever flap a minimum disc distance of A = 5mm not given. Then you risk that the rotating wing disc collides with the helmet. In this case the rain protection disc can be individually adapted by moving of the drive bearing arbour 8. up to 10mm. Webshop: A suitable modification instruction will be delivered with.
An appropriate conversion Instruction will be delivered !