details about chain drive and sprockets

[omatza]

Hello

I have RC390 white ABS, year 2016.


I looked at 2016 KTM RC 390 White ABS Rear Wheel | KTM Parts Pro and found two things:


1) that the 90110015100 kit of chain and sprockets, but it doesn't mention what chain, and if it comes with rivet link, or close chain. Anyone knows ?
2) that there is 00050002059, that cost 137$, but same questions apply :-(
(it is also 2015)
3) I count 112 links on my chain. in the web site it is written 118. why ?
4) Anybody know how many links are in the original chain, and how many theeth in each sprocket ?


Thanks a lot
omatza