Stripped down my carb so I could note the numbers on the jets for future reference. The pilot was #48, the biggest one listed in the repair manual for any of the models.
However, when it came to the main jet, it was rated #70. The closest main jet value in the manual is #60!
What's going on here? The moped article here said jets are often rich on European machines, but by that much? What could I expect by fitting a lower one? Better fuel consumption I hope. I'm told I shoud be getting high 80mpg to 90mpg. I'm getting more like 60-70.