So, I have been riding my CFMoto for some time, and the new problems started appearing.
1. The oil pressure sensor started leaking oil.
2. The water pump started leaking water.
3. The water pipe from the oil pump cracked and leaks water too.
4. The intake manifold on the engine (the one between the EFI assembly and the block has started sucking air in, which causes power loss between 5 and 6 thousand RPM.

http://www.productreview.com.au/p/cf-moto-650nk.html

This thread above has a lot of minor problems mentioned that 650 NK rider have had. I seem to have experienced all of them...