125-200cc Keihin NJWE needle

Does anybody knows anything about that needle. I only found that it was the OEM needle of TM 250-300 2010 but I have no idea how it is compared to the NOZ, N1 and NEC/NED needles.
Any help would be much appreciated

typically letters and numbers indicate length and taper dimensions
just need to find a chart, possibly from a retired tuner

Thanks 2premo for your reply.
I've already searched the whole internet but I haven't found anything yet (only the TM reference)
But I don't give up and keep searching in free time

http://www.dragonfly75.com/moto/jettingKeihin.html

there are many more of these
scroll down and all the specs of the needles can be figured out

http://www.dragonfly75.com/moto/verifyPWK.html

info was based on our jetting site

Many many thanks Dirtdame and 2premo, I'll dig into them