Greetings Gang: This is my first post. Hope I've read enough of the archives to prevent me from sounding like a total idiot.
I just purchased a 1978 Vespa Bravo. It's complete with 1300 miles, but I don't know its history. I changed the spark plug (put the correct one in) and have managed to get it running with a hell of a long hard downhill pedal. It actually chugs along at 20 miles an hour pretty well as long as I'm going downhill.
Unfortunately, the minute we head uphill, the power vanishes and in short order the engine dies. Any suggestions on the first place to make adjustments? Thanks for your help with this. Gary