I had asked once before about the air/fuel mixture screw which is under the bowl once again screwing it in will make it leaner right? And screwing in out will make it richer right? The reason I asked is I put a UNI filter on and it seems to me after the motor is warm I will give it full throttle real fast and it seems to hesitate a bit like it is gasping for fuel or air and it is poping out of the exhaust when you rev it.. Any help once again would be very thankfull I believe it is running a lil lean....

 

Immediate lag on full throttle and especially popping are signs it's running lean. Turning out the mix will make it richer, but those screws are ususally only good for about 3 turns. After that it doesn't do any more {at least on my Suzuki bike it worked that way}.

I'd try that, maybe 2.5 turns out from all the way in. If you still have some hesitation, try raising the needle a notch {by lowering the clip one position, thus rasing the needle}.

 

if you change the pilot jet from stock #38 to #45 that will fix your problem,

 

What brand jet are they, Mikuni or Keihen? And where can you get some?

 

To find out exactly what jets you need for the Chinese carb, pull the carb bowl off. Remove the jets you want to replace and measure them. Most of the time you can get away with just eyeing the jet. Get the number off the jet and go from there. Jets can be obtained from your local motorcycle shop, or go here.

Here is the Keihin Jet List
Here are some Mikuni jets and what they look like. Mikuni Jets

SB.

 

they're keihin's series 21 ,