Sounds like a bad float or needle and seat assembly. Time for a rebuild.
what is the needle valve adjustment on a 125 DR
Disassemble the carburetor and replace the needle and seat, following the manufacturers assembly and adjustment recommendations.
You need a flexible flat head screwdriver. It looks like a regular screwdriver except the shaft is a tightly wound spring.
if you are sure your car has a carbuerator and not fuel injection like all newer cars,the needle would be attached to the topside of the float in the bottom of the carb, its purpose is to slow or speed up fuel flow into the carb. hope i helped, but i think that year of car may be fuel injected, firstname.lastname@example.org if you have any questions
Could be,Foreign material (dirt, rust, etc) caught in the needle and seat,Bad float,Float is out of adjustment,
Could be that the fuel filter is clogged and not allowing sufficient fuel to pass to the carburetor; you might also check the carburetor adjustment needle(s) to see if they may have rattled toward the closed postion.
Adjustment might not help. Sounds like the needle valve has to be changed. Might not be seating properly and therefor flooding the engine.
That is the main jet needle valve.
A bad, stuck or dirty float needle inside the carburetor.
When fuel cannot enter a carbureator like yours I would think it is because the float and /or needle valve is stuck. In other words the carburetor thinks it is full of fuel so it is shutting off any more incoming fuel. The filter on that model should only be inline not in the carb. I would remove the carb and take the top off of it. Take a can of GUMOUT and clean the needle /seat assembly good and make sure the float is working properly.
The needle and seat.
Set it to exact manufacturer specifications.
either there is dirt in bowl or needle and seat is worn
Basic adjustment for small engines carburetors: Close (rotate clockwise) needle valve but do not overtighten since the coated tip may get damaged. Open (rotate counter clockwise) needle valve 1-1/4 to 1-1/2 turns. This should be ok to start the engine. Start the engine and allow to warm up for 5 minutes. Then fine tune the carburetor by SLOWLY closing the needle valve until the egine starts to stall for lack of fuel (mixture too lean). Then SLOWLY open the needle valve until engine starts to stall due to excess fuel (mixture too rich). Set the needle valve midways between the two extremes. If the carburetor has two needle valves, one is adjucted at idle and the other at half throttle.
The carburetor needs rebuilding including a new float, needle and seat, assuming it has a carburetor.
Assuming it's a carburated engine, the problem is a stuck needle and seat inside the carburetor. If everything else is ok, just remove the top of the carburetor and replace the needle and seat.
That's typically caused by a worn "needle and seat" assembly. You can purchase a needle and seat assembly for a specific carburetor, but it's best to purchase a rebuild kit and do the whole thing.
On the top of the carburetor there will be a cable leading to a bottle cap looking deal unscrew that off of the carburetor and there at the bottom of what comes out you will see the needle of the needle valve. Be careful not to put it back in the wrong way, if you do the ATV either wont start or it will run WIDE open when you so start it.
I would suspect a bad needle valve and seat in the carburetor. The float level can also be set too high. I would replace the needle valve and seat and check float level.I would suspect a bad needle valve and seat in the carburetor. The float level can also be set too high. I would replace the needle valve and seat and check float level.
Dirty or stuck open needle valve in carburetor.
Bend the tab that contacts with the "needle". But DON'T put pressure on the needle when you do so. Carburetor rebuild instructions that come with the carb rebuild kit will tell you how to adjust everything and give optimum float level settings.
Stuck floats or dirty needle valve.
needle & seat maybe dirty , also check float level
Your carburetor is loading up. Or your needle valve is out of place or stuck.