Gave up on the manual folks. Called supposedly the biggest Kawasaki parts dealership in the country, and exactly the same mistake. No more 99924-1488-01. It was superceded by -31, so I'd get exactly the same thing. Parts manager said Kawasaki didn't want to look into it. He was baffled by that, as well as being the only service manual p/n available for the Gen2 bikes. He was told to just order the manual and if it's not what it's supposed to be, then file a special form so KHI can investigate. It'd take months, so I glady accepted the .pdf file of a forum member who offered it. Tried to buy it thru a dealer, but I'm done wasting time and waiting for months.
By the way, even though manuals say CA and 49-state bikes are different, they're the same for 2015. Something changed late in the game, I guess. All bikes I've seen are CA-emissions equipped... and have been several by now. And everybody here outside CA with a 2015 reported the same. My NM bike is CA-spec, and thought it was a fluke, but it's not. And yes, fueling was changed for 2015 to comply with new emissions (including larger cats), so ECU HAS to have a different p/n than previous bikes. Curiously, the 5-page supplement I received for 2015, has absolutely no mention of the changes we know happened, like the gearbox change (shorter 1st gear), reprogrammed ECU, larger cats, different brake module, different steering stem, etc. All 5 pages were of the fueling system, and the only difference from the 2010+ Gen2 manual was a different intake sensor. The other pages only had slightly different instructions, but no changes. So that supplement is basically useless to me. Thank you very much for the help folks. Hopefully this issue will be resolved in the future, and you're welcome to continue the thread until that happens. But I'm done looking for a solution. Enjoy the rest of your weekend.