You can have two, one on either side. I also think that they can key both sides the same so you will only need one key. Contact Matt at Lidlox and ask him directly.
Another way to mount is to hang the helmet on the mirror and attach the lidlox on one of the bolts that secure the hand brake fluid pot.
There are videos on the website.
Last edited by BryanC; 11-05-2017 at 08:10 AM.