The pilot, or idle jet appears to be exactly the same between my Lifan Carb and the OE Honda carb [Keihin].
The Lifan carb appears to use what I used to call "flat-top" jets. These look just like a small flat blade screw, only with a hole in the center. Honda used this style jet back in the '70s.
The bowls are slightly different as well. The Keihin bowl is deeper, and the jet is mounted on an extension, I would say this is to keep the jet in the fuel in extreme conditions.
Based on appearances, you could possibly buy the Keihin jet holder and deeper bowl, then convert to late model Keihin jets.
FYI, my Keihin carb is from a '93 XR200.
Here is a good place to shop for jets, after doing your homework
www.sudco.com