does anyone know what problem is when my x9 doesn´t idle at all? once it warms up, the engine will shut off if I don´t rev throttle above 2000 rpms. I can´t stop at red lights, stop signs or high traffic without revving engine. It also doesn´t like to drive up any steep hills. Is this a belt problem? Or maybe a throttle cable problem? I´d like to know what to tell the mechanic when I take it in since there are no piaggio mechanics within 50 miles of me.