I just got my first moped which is a 1979 Batavus (regency, I think). It's in very nice visual shape and only has 1100 miles. The problem I'm having is that it starts and runs for a brief period of time (5 minutes), but then starts stalling and stalls more and more. It also sort of joltingly loses and gains power as it stalls.
When it stalls, I can usually wait a few minutes and then get is started again for another 30 seconds before stalling again. The stalls become more frequent as it runs.
I've read some of the articles on the site and it seems like this is either a carbeurator problem or a spark plug problem. Does it sound like it's obviously one or the other?