I bought a Vespa Bravo, and it's extremely difficult to start, I have to pedal like crazy, and it never starts on the first try. Once I pedal and get it started, it will die if I try to give it any gas to rev the motor. I have to start it three times at least to get it going.
On top of that, once I've finally started, if I give it gas through the middle range of the throttle it wants to die. Even when the engine warms up, there is a hesitation through the middle of the throttle range. I have to gun it completely or it's in danger of dying. What could be causing this?