yesterday my moped revving was completely knackered. it could only go to around half revs - any more and the engine would just cut out completely. i took it to the motorbike shop where they are currently carrying out repairs on it. they rang up and said they checked the engine and carburettor, they said they found a blue liquid in the engine. they said that they believe it could be due to a drink somehow getting into the engine, as they found several empty bottles in my seat compartment, one of which was a bottle of powerade (which has the same colour as the liquid in the engine) but i seriously doubt that liquid from a near empty bottle could have gone through cracks in the compartment, gone through the carburettor and flooded the engine. does anyone know what the problem could be?