Suzuki SJ410

I have the next problem, I have a SJ410 Suzuki, which was stopping only with little power.
The carburetor was disassembled, and he was clean completely solving all the problems, recovered power, force, he did not stop slowing down, and we were even doing the gas analysis and everything was ok, all proven.
The afternoon I impeque until the engine went out to park, then the car comes on and began to sound half weird, and under the power again, and I stopped in each traffic light.
I arrive at the house to check the carburetor, take out the air filter to the mouth of the carburetor, and to accelerate this one tends to turn off, does not respond and sounds like when the trucks stop with the engine, and even when opening the butterfly suddenly, the engine stops.
Any indication that can be the cause ????