Just a couple of additional comments; I mentioned my dealer's policy records key codes of new bikes; Kawasaki's does NOT! You can't correlate key codes with VINs through the manufacturer.
Next, stop me if I'm wrong, but . . . I THINK a key code can be read from a disassembled lock cylinder.
No need to mentin, both left-hand and right-hand key blanks exist.
Haven't lost a key (yet!), but . . . parked outside my house; dashed in to change jackets; returned immediately, and . . . local malicious mischief pre-delinquent overprivileged high school kids on their way home had LIFTED the key from my bike . . .
(MORAL: NEVER leave your key in the lock.)
Had spare key; rode straight to my Kawasaki dealership and got a replacement; blanks aren't that common that your local Ace hardware's likely to have 'em in stock; I think BigCee FAQ's lists some sources, other than Kawasaki dealerships.
Can I use a different key blank for the ignition?
If you don't want to shell out the big bucks for a Kawasaki factory key blank, here are some alternatives that should work. Of the keys listed below, the Silca KW14 and KW14R are the only truly correct ones. It would probably be best to take the whole list to your key shop, and let them pick the one that will work the best. NOTE: The KLR comes with both right- and left-hand keys (the direction of the offset in the cross-section). So, not every blank will work.
SILCA KW14, KW14R Curtis YM-58 (Yamaha?) Ford 5-cut primary blank
ILCO KA15 X106 ILCO YH38 X77 ILCO X120 YH46
Taylor X90, X91 Curtis SU-9 (Suzuki)