Vespa banjo bolt topper gasket and air screen to fix the leaking petcock and tidy up the carb. Clean and gap the plug and fresh gear oil. Purrs like a really loud kitten and the dry clutch holds a nice steady idle without engaging the prop.
Found the same thing on this motor as I have found on more than one moped that "doesn't run" and that is when a novice has an empty tank and dumps in a couple of ounces of oil and then walks out and finds their gas can and comes back and fills the tank... By then all the oil has made its way into the carb filling the bowl to the top "and it just won't start no matter how many times I try" haha!