where can I find smaller pilot jets of Sheng wey pz27 carburetor?

[wolframazer]

I already this installed it to my yamaha ybr 125 the only problem is the pilot jet is very big for 125cc and I search on the internet selling smaller jets like that but can't find one, the main jet isn't a problem. this is not my pic but this the look of my pilot jet I get here in this website I think I need a 20 pilot jet
the stock one is k40a http://https://www.chinariders.raptorrefuge.com/attachment.php?attachmentid=10961&stc=1&d=1507881010

[franque]

It's probably not that small that you need. Have you tried running it yet? You're thinking Mikuni numbers for jets, they're usually ~20 smaller, i.e. a 20 Mikuni is roughly a Keihin 40, the Sheng Wey being a copy of a Keihin PD, using Keihin numbering. Sheng Wey jets are sometimes hard to find, slow us a picture if you please. There is a kind that is harder to find, if in fact that is type you need, you can solder the jet up and re-drill it to a smaller size.

[wolframazer]

this is not mine but this is the look of the slow jet of my sheng wey pz27, I bought it in lifan local store, I really like the oem quality carburetor than cheap knock offs, this carburetor is heavier than my kelkong pz27 but I mount it on my other motorcycle and I already sold it, the jets of sheng wey quality is good the only problem is I think the k40a slow jet is very large for 125cc, I don't know what is the meaning of a in k40a

[franque]

It's like I explained, just try it and see. K40a means it's a Keihin 40.

[wolframazer]

is it normal? when I twist the throttle a little bit the engine almost die after few seconds 3 seconds after small throttle twist then back to normal idle, i tried to adjust fuel air mixture, it doesn't help that much. my previous aftermarket carburetor kelkong pz27 doesn't have that problem.

[franque]

Take off the air filter and see if it makes it better, or worse.

[wolframazer]

it's the same

[franque]

Does it run better with the choke on?

[wolframazer]

it doesn't, by the way is there any aftermarket maker of jettings for this pilot jet?