I find it amazing that you're being put through such an ordeal just to get a motorcycle registered.
Ironically I just bought a 600B1 earlier this week. In my case though, I picked up the registration and plate at our tax collector/DMV on my way home. Maybe we're the bad ones here; dunno.
Also...fwiw...the owner had the Service Manual and the Supplement that he included in the deal. The needle jet marks, as they're called in your screen shot, is just the Keihin needle part number. Needles come in different sizes...length, width and tapers. You should be able to find info and tables online to decode the part numbers N24B and N24C to see what the differences are, but I don't see how that's going to help with that red tape.
The N24C that your gov wants you to use is at least available on US-based Kawi OEM Parts sites, but you have to go to the US 600A1 model in the part fisches. As mentioned above, they changed the US spec from N24C to 24F for B1-B5 model years. I'm not sure if you're aware but there's a Service Manual Supplement (as referred to in a previous post) to the above screen shot for B1-B5 models that has the changes. I also see that the 150 Main Jet is also available for the CVK40 from other online sources.
It really is amazing what i have to go through to just Register a motorcycle that even was sold here in switzerland!
Could you (or anyone else) provide me with the full KL600B Supplement? I am asking all these stupid questions about the needle and jet sizes because i get the impression someone at the registration office falsely looked at a KLR 650 (I think the KLR650 had a 150 main jet?) or something else to get me the numbers to the parts i have to install.
The N24C Needle is very hard to get here (because it was never used in europe it seems) and the 150 Main jet is probably way to rich what would probably screw up my emissions test, So i Need the official Kawasaki paperwork to just prove they have the wrong data.
After digging a Little deeper everyone said that the swiss version of the 600B had exactly the same jetting as the european /german version
(the german repair Manual Supplement sais the following i think, but i could not get it from anywhere -not even an official dealer- and buying it in the us is a hassle and takes a long time)
(Switzerland is CH and Germany DE)
I much appreciate you all helping me through this hassle!