ItsLeon

Hello! I've got a Lexmoto Echo 50cc, just got it serviced. Worked perfectly on the ride to the petrol station but after I fueled it the fuel meter went out on me. I presumed it was because I over filled it. It's outside my house at the moment and I took it for a test run, the meter goes up but glitches out and goes back down and up again. I'm not sure what's happening as they have just fixed it? Any help would be great, the charge for another service is £70 incl labour. Thanks