Put a cheap helmet lock on the right side tip over bar. This puts it on the high side while on the sidestand, but being so low places it close to the muffler, so I may not leave it there.
Helmet extenders are cheap on Amazon, and work fine with the newer ratchet-style chinstrap on the Neo 2. I didn't think these would work without D-rings, but the only challenge is keeping up with the extender, and I've lost 2 already.
I first put this helmet lock on the GSA, and it fits the luggage rack a lot better, so now I just put the extender on my carabiner key ring.
