Thanks for the reply, and yes, the issue occurred when I was in the process of doing that. I had a pin that came with a pinlock for another helmet, and used it, and set the Arai one in the closed position and inserted that end first, install went fine. I think the KISS method may should have been initially used by Arai. But in any case got it installed and worked perfectly, rode for hours in a cold rain and NO fog, as i have experiences with the pinlock in other helmets.
