Also just an FYI...mikuni trade Mark is a small “box in a box” which is on all their parts...
Last week I finally received the pilot jets from AliExpress, for my latest Chikuni VM22. I ordered 12pcs "Keihin N424-74C" in different sizes from 30-40 range. It was $9,99 for 12pcs. They fit my latest carb. And it fits.
I also ordered 12 of the Mikuni style pilot jets (the longer ones with M4 thread. Also different sizes in approx. 12.5-25 area. Also $9.99/12pcs.
These pilot jets do have the Mikuni trade mark stamped on them (the box in a box). But for that price, I don't think it's genuine Mikuni?
Currently I'm re-jetting the VM22 carb and I'm confused about the function of the pilot mixture screw. Airscrew or fuelscrew?!
At first it didn't make any rpm difference if I turned it all the way in or out. After I replaced the 38 pilot jet with a 33 pilot jet, the engine rpm's increase slightly if the pilot screw is nearly turned all the way in. So the pilot screw is "starting to function" with the smaller pilot jet installed. If it was an air screw, that wouldn't make any sense.
I will see what happens when I install an even smaller pilot jet. If adjusting the "pilot air/fuel mixture screw" does have a larger effect than it does with the current pilot jet, I'm positive it is a fuelscrew, instead of an air screw.