Well, I have a 1978 Vespa Grande, and I have been riding it this spring for the past two weeks. It has been running fine untill last night. I was out for a cruise and while I was going at 27 mph the moped just stops running, the lights turns off, and I slow to a halt. I try to start it again, and it doesn't seem like the engine is moving. I'm really bad at the terminology so, you'll have to forgive for my lack of articulation. But, when I usually start the moped, I run with it, at some point when I have enough speed, it feels as if the engine catches, and the engine makes a sound like it is trying to run. But, now, when I try to start it, it feels as if the engine catches, but there is no sound. That is the best I can do to describe the problem. The carb was cleaned just a few days ago, so it can't be the carb. Could anyone help me out with some direction. I do not even know where to begin on a problem like this.