Hi all recently picked up this zongshen 125 atv that was disabled by a young man and with no manual or anything to really look at I'm stumped, there is a peacock with 4 male ends a and the intake manifold also has a male end the carb has a couple different ports, if anyone has a picture or diagram of the fuel and vacuum lines or just a point in the right direction would be great

 

Got it figured out but now it will only run if the choke is on and will die if you even touch the throttle

 

glad you figured it out. now an easy fix for you and you'll learn more about your quad.....your jets are plugged/clogged. you need to pull the carb off of the quad, pay careful attention to the flange and boot that the carb connect to. also, when you pull the slide out of the carb with the throttle cable, pay attention to it. you'll notice slots on the slide. then look inside, you'll see the "****" that the slots use to align the slide. now, pull the float bowl off, pull the jets out, clean them til you see daylight through all orifices and down the center, then reinstall everything, fire it up. the reason it bogs down is a fuel delivery issue, not enough fuel and you're pulling more air in thus killing your fuel/air ratio for combustion.

https://www.youtube.com/results?sear...an+an+atv+carb
now your carb may not be exactly what you see in any of these videos, but the step by step instructions and the principle is the same. if you're still uncomfortable doing the carb, then take it to a cycle shop and pay them <$100 to clean it.

 

Well I cleaned the carburetor took the bowl off and seen some gunk in the bottom there were only 2 removal jets the one seemed ok but the one in the middle was plugged actually had to drill it out with a 1/16 bit, removed the top and the plunger was pretty clogged cleaned it and seems to move freely, there was one one the choke side I removed it and it was tarnished but not clogged , pretty sure that one is the air fuel mix , anyway put it back together and it would only idle on choke but did have throttle response now however would only run with the a 1/4 throttle or better and had white smoke, I'm gonna try to run Lucas carb cleaner through it with premium gas, my question would be that fuel air jet how to set it as I can't get to it once the carb is mounted I can see it but just can't get in there, any thoughts

 

double check with MWQ, mywifesquad, i think it's supposed to be 2 1/2 turns out. i think....

 

with all that gunk in the carb Id guess the pilot circuit of the carb is plugged.. The carb needs super cleaning(soaking in carb gunk maybe) and the tube the main jet screws into has holes in the side of it.. they need to be clear...

1 1/2 turns out is a good place to start for the fuel screw... past 3 turns and you need a bigger jet.