Can't remember where this was covered before, but I came up with a quick and dirty helmet lock for my Strada. I put a hose clamp on the left frame rail, right around the battery compartment, with the screw facing inwards. I hook the D ring on my helmet over the screw, and lock the seat down in place. works like a charm. Here you can see my helmet hooked onto the clamp With the seat locked in place, the helmet is secured. I'm sure if someone tugged on it hard enough, it would come free, or they could cut the strap and ruin the helmet, but it will stop the casual opportunistic thief. --Chris