My Burgman was the same as this bike for using that security cable looped over a hook under the seat. At least is only takes a key to remove the seat on both. There are aftermarket locks available. One attaches to the license plate mount. I, again, take the cheap route and use a small retractable cable lock similar to THIS around the handlebar between the clamps in the middle and set my helmet on the top shelter. Been doing that with the Burgman, my ST, and now the CTX. The cable lock stores very nicely in the smaller left storage box. I have another cable lock, like what is used for securing bicycles, that I use when I want to secure my jacket over my windshield. That one I run through the jacket sleeve and secure to the bike the same way. I have secured multiple jackets and helmets with just these 2 cable locks before, usually when the bags are already full of shopping goodies when my wife did ride with me.