Ordered 2 spare keys from
www.keys4urride.com, and supplied the key code from the helmet lock to have them cut. Cost 2 key blanks, cutting, and shipping was $25.60.
Having only one key makes me a bit nervous, so having spares is always a good thing.
http://www.keys4urride.com/kawasaki-...rrsumig9kgqu6y
http://faq.ninja250.org/wiki/What_do..._about_keys%3F
Look at "What if I lose all my keys?" Part to find the key code.