Picture above shows protrusions in visor that are held in place by visor connector on helmet pictured below.

Pull lever to fully expose visor protrusions to release visor. You must pull up on visor at same time you are holding connector in protrusion release position with finger for visor to unsnap from connector.

To reinstall visor hold connector shown below in open position.

Make sure protrusions circled below are in proper position on connector and press hard to snap visor back onto the connector.