The last few digits are the production order, like mine is something like 00035. It also seems California and the rest of the nation have separate numbers. I believe there was another somewhere else with the same number as mine. It's been most of a year since that thread popped up.
LOL, nope, no helmet lock. There are a few posts where folks have made real clean installs of various locks. I like the one that incorporates the lid and box of a panier as the lock. I think they're all in the "What have you done to your Tenere" thread. I leave a bicycle lock coiled around my right passenger peg. I can lock up several helmets through the chin bars, or less securely through the chin strap.