Your needle valve either has dirt stopping it close properly or the float is faulty. You need to turn off the fuel, and drop the float bowl off "carefully" and check the needle valve above it if there is no obvious problem with the float.

Remember there may also be petrol in the sump, if the bike is four stroke then the oil will need changing as it will be diluted down.

Does this moped have a fuel petcock (valve) on the bottom of the gas tank? If so, you should turn it to the "OFF" position when you stop the motor. If not, then your carburetor needs a new float

Take it back to the garage - but don't try and ride it there unless you want the engine to catch fire. You have a fuel leak, and it will need to be properly repaired.

hi the guy I bought it off just told me it happens because its got a jack up kit and a side stand its too slanted and thats why it starts happening because it leaning to much? he said he used to lean it against a wall instead and it never happened for him then, could this be the problem?

i have recently purchased a moped i filled it up the other day ready for my birthday so i can be readytp go out on it and today i have notoced that it wint start i looked about and the air filter had a few drips coming from it so i opened it up and a pool of petrol come out, i went back up there again about 20 mins later and the air filter was already starting to fill and the bike wouldnt start again, what could be the probpem as its got mot weWednesday?