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Hey guys, i've searched all over the forum and can't seem to find a solution to my problem... So i bought a 08 chinese scooter with the GY6 engine.. and it ran fine, but top speed was 50mph barely, so i thought i would take apart the carb and clean it, I put everything back together and threw it back into the scooter.. but now once it starts, it runs for 20-30 seconds and dies, if i give it full throttle it revs up fine, and stays running for another 20 seconds.. It does not make any unusual noise like popping or anything, just slowly dies.  It seems like its running out of gas? I took apart he carb and did not find any dirt in the jets... I didn't mess with the A/F mixture screw so i left it where it is, and idle screw i tried adjusting with no luck..

I also checked all the vacuum and fuel lines and they look good, no gas leaks either.. I am at a loss